canal vs vent

canal

noun
  • A tubular channel within the body. 

  • An artificial waterway or artificially improved river used for travel, shipping, or irrigation. 

  • One of the faint, hazy markings resembling straight lines on early telescopic images of the surface of Mars. 

verb
  • To dig an artificial waterway in or to (a place), especially for drainage 

  • To travel along a canal by boat 

vent

noun
  • A small aperture. 

  • An opening in a volcano from which lava or gas flows. 

  • Opportunity of escape or passage from confinement or privacy; outlet. 

  • The opening at the breech of a firearm, through which fire is communicated to the powder of the charge. 

  • Ventriloquism. 

  • A slit in the seam of a garment. 

  • Emission; escape; passage to notice or expression; publication; utterance. 

  • An opening through which gases, especially air, can pass. 

  • The excretory opening of lower orders of vertebrates. 

  • A rant; a long session of expressing verbal frustration. 

  • In steam boilers, a sectional area of the passage for gases divided by the length of the same passage in feet. 

verb
  • To allow gases to escape. 

  • To determine the sex of (a chick) by opening up the anal vent or cloaca. 

  • To ventilate; to use a ventilator; to use ventilation. 

  • To express a strong emotion. 

  • To snuff; to breathe or puff out; to snort. 

  • To sell; to vend. 

  • To allow to escape through a vent. 

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