distend vs fatten

distend

verb
  • To extend or expand, as from internal pressure; to swell 

  • To cause to swell. 

  • To cause gravidity. 

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 distend and fatten occurred in a corpus of books? (source: Google Ngram Viewer )