dilate vs fatten

dilate

verb
  • To enlarge; to make bigger. 

  • To speak largely and copiously; to dwell in narration; to enlarge; with "on" or "upon". 

  • To use a dilator to widen (something, such as a vagina). 

  • To become wider or larger; to expand. 

fatten

verb
  • To become thick or thicker. 

  • To make (soil) fertile and fruitful. 

  • To become fertile and fruitful. 

  • To cause (a person or animal) to be fat or fatter. 

  • To become fat or fatter. 

  • To make thick or thicker (something containing paper, often money). 

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