apropos vs bout

apropos

prep
  • Regarding or concerning. 

adj
  • Of an appropriate or pertinent nature. 

  • by the way, incidental 

adv
  • To the purpose; appropriately. 

  • By the way. 

  • Timely; at a good time. 

bout

prep
  • Aphetic form of about 

verb
  • To contest a bout. 

noun
  • A roller derby match. 

  • A fighting competition. 

  • A bulge or widening in a musical instrument, such as either of the two characteristic bulges of a guitar. 

  • An assault (a fencing encounter) at which the score is kept. 

  • A boxing match. 

  • A period of something, especially one painful or unpleasant. 

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