mainline vs pop

mainline

verb
  • To consume voraciously. 

  • To integrate (code, etc.) into the main repository for a software project, rather than separate forks. 

  • To inject (a drug) directly into a vein. 

noun
  • In longline fishing the central line to which the branch lines with baits are attached. 

  • An airline's main operating unit, as opposed to codeshares or regional subsidiaries. 

  • The principal route or line of a railway. 

  • A principal vein into which a drug can be injected. 

  • The main repository for a software project, from which different versions (forks) may be split off. 

  • The pipeline carrying wastewater to the public drains or a septic tank. 

adj
  • Normal, principal or standard. 

  • Of or pertaining to the principal route or line of a railway. 

  • Of or pertaining to a surface railway as distinct from an underground, elevated or light rail one. 

  • Of a sequence of opening moves: being part of a main line ("a standard sequence of opening moves considered to be best play"). 

pop

verb
  • To swallow or consume (especially a tablet of a drug, sometimes extended to other small items such as sweets or candy). 

  • To perform (a move or stunt) while riding a board or vehicle. 

  • To burst (something) with a popping sound. 

  • To give birth. 

  • To make a pop, or sharp, quick sound. 

  • To stand out; to be distinctive to the senses. 

  • To shoot (usually somebody) with a firearm. 

  • To ejaculate; to orgasm. 

  • To pawn (something) (to raise money). 

  • To hit (something or someone). 

  • To remove (a data item) from the top of a stack. 

  • To place (something) (somewhere); to move or position (something) with a short movement. 

  • To perform the popping style of dance. 

  • To undergo equalization of pressure when the Eustachian tubes open. 

  • To make a short trip or visit. 

  • To enter, or issue forth, with a quick, sudden movement; to move from place to place suddenly; to dart. 

  • To arrest. 

noun
  • Something that stands out or is distinctive to the mind or senses. 

  • A Russian Orthodox priest; a parson. 

  • A bird, the European redwing. 

  • A quantity dispensed; a portion; apiece. 

  • A pop shot: a quick, possibly unaimed, shot with a firearm. 

  • A loud, sharp sound, as of a cork coming out of a bottle. 

  • An effervescent or fizzy drink, most frequently nonalcoholic; soda pop. 

  • The removal of a data item from the top of a stack. 

  • One's father. 

  • A small, immature peanut, boiled as a snack. 

  • Pop music. 

  • A bottle, can, or serving of effervescent or fizzy drink, most frequently nonalcoholic; a soda pop. 

  • The sixth derivative of the position vector with respect to time (after velocity, acceleration, jerk, jounce, crackle), i.e. the rate of change of crackle. 

adj
  • Popular. 

intj
  • Used to represent a loud, sharp sound, as of a cork coming out of a bottle. 

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