trail vs train

trail

verb
  • To carry (a firearm) with the breech near the ground and the upper part inclined forward, the piece being held by the right hand near the middle. 

  • To show a trailer of (a film, TV show etc.); to release or publish a preview of (a report etc.) in advance of the full publication. 

  • To run or climb like certain plants. 

  • To be losing, to be behind in a competition. 

  • To leave (a trail of). 

  • To transport (livestock) by herding it along a trail. 

  • To hang or drag loosely behind; to move with a slow sweeping motion. 

  • To follow behind (someone or something); to tail (someone or something). 

  • To drag oneself lazily or reluctantly along. 

  • To travel by following or creating trails. 

  • To drag (something) behind on the ground. 

  • To create a trail in. 

noun
  • A trailer broadcast on television for a forthcoming film or programme. 

  • The track or indication marking the route followed by something that has passed, such as the footprints of animal on land or the contrail of an airplane in the sky. 

  • A walk in which all the edges are distinct. 

  • A route for travel over land, especially a narrow, unpaved pathway for use by hikers, horseback riders, etc. 

  • A route or circuit generally. 

  • The horizontal distance from where the wheel touches the ground to where the steering axis intersects the ground. 

train

verb
  • To move (a gun) laterally so that it points in a different direction. 

  • To encourage (a plant or branch) to grow in a particular direction or shape, usually by pruning and bending. 

  • To improve one's fitness. 

  • To create a trainer for; to apply cheats to (a game). 

  • To teach and form (someone) by practice; to educate (someone). 

  • To proceed in sequence. 

  • To practice an ability. 

  • To trace (a lode or any mineral appearance) to its head. 

noun
  • A long, heavy sleigh used in Canada for the transportation of merchandise, wood, etc. 

  • A set of interconnected mechanical parts which operate each other in sequence. 

  • A transient trail of glowing ions behind a large meteor as it falls through the atmosphere or accompanying a comet as it nears the sun; tail. 

  • A group of people following an important figure such as a king or noble; a retinue, a group of retainers. 

  • A group or class of people. 

  • A sequence of events or ideas which are interconnected; a course or procedure of something. 

  • A trail or line of something, especially gunpowder. 

  • A series of specified vehicles (originally tramcars in a mine as usual, later especially railway carriages) coupled together. 

  • The tail of a bird. 

  • A mechanical (traditionally steam-powered, now typically diesel or electrical) vehicle carrying a large number of passengers and freight along a designated track or path; a line of connected cars or carriages considered overall as a mode of transport; (as uncountable noun) rail or road travel. 

  • The elongated body or form of something narrow and winding, such as the course of a river or the body of a snake. 

  • The men and vehicles following an army, which carry artillery and other equipment for battle or siege. 

  • An act wherein series of men line up and then penetrate a person, especially as a form of gang rape. 

  • A set of things, events, or circumstances that follow after or as a consequence; aftermath, wake. 

  • A series of electrical pulses. 

  • The elongated back portion of a dress or skirt (or an ornamental piece of material added to similar effect), which drags along the ground. 

  • A group of animals, vehicles, or people that follow one another in a line, such as a wagon train; a caravan or procession. 

  • A software release schedule. 

How often have the words trail and train occurred in a corpus of books? (source: Google Ngram Viewer )