dipper vs tunnel

dipper

noun
  • A cup-shaped vessel with a long handle, for dipping into and ladling out liquids; a ladle or scoop. 

  • A Baptist or Dunker. 

  • A person employed in a tin plate works to coat steel plates in molten tin by dipping them. 

  • Any snack food intended to be dipped in sauce. 

  • The control in a vehicle that switches between high-beam and low-beam (i.e. dips the lights), especially when used to signal other vehicles. 

  • Any of various small passerine birds of the genus Cinclus that live near fast-flowing streams and feed along the bottom. 

  • A pickpocket. 

  • One who, or that which, dips (immerses something, or itself, into a liquid). 

  • A person employed to assist a bather in and out of the sea. 

tunnel

noun
  • A vessel with a broad mouth at one end, a pipe or tube at the other, for conveying liquor, fluids, etc., into casks, bottles, or other vessels; a funnel. 

  • An underground or underwater passage. 

  • A passage through or under some obstacle. 

  • A hole in the ground made by an animal, a burrow. 

  • A level passage driven across the measures, or at right angles to veins which it is desired to reach; distinguished from the drift, or gangway, which is led along the vein when reached by the tunnel. 

  • The opening of a chimney for the passage of smoke; a flue. 

  • A wrapper for a protocol that cannot otherwise be used because it is unsupported, blocked, or insecure. 

  • Anything that resembles a tunnel. 

verb
  • To make a tunnel through or under something; to burrow. 

  • To transmit something through a tunnel (wrapper for insecure or unsupported protocol). 

  • To insert a catheter into a vein to allow long-term use. 

  • To undergo the quantum-mechanical phenomenon where a particle penetrates through a barrier that it classically cannot surmount. 

  • To dig a tunnel. 

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