drainpipe vs launder

drainpipe

noun
  • A conduit for carrying rainwater or flood water. 

  • A pipe that carries wastewater from a bathtub, shower, sink, etc. 

  • A pipe that is part of a device or appliance for carrying away waste fluid. 

  • The type of pipe that is used to construct a drainpipe. 

  • A type of form-fitting trousers with highly tapered legs. 

  • A verticle pipe carrying water from the roof gutter down the side of a building; downspout. 

launder

noun
  • A trough or channel carrying water to the wheel of a watermill. 

  • A gutter (for rainwater). 

  • A trough used by miners to receive powdered ore from the box where it is beaten, or for carrying water to the stamps, or other apparatus for comminuting (sorting) the ore. 

verb
  • To disguise the source of (ill-gotten wealth) by various means. 

  • To wash; to wash, and to smooth with a flatiron or mangle; to wash and iron. 

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