bottoms vs polder

bottoms

noun
  • The bottom (trouser) part of clothing, as in pyjama bottoms, tracksuit bottoms. 

polder

noun
  • An area of ground reclaimed from a sea or lake by means of dikes. 

verb
  • To reclaim an area of ground from a sea or lake by means of dikes. 

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