adjacent vs apropos

adjacent

adj
  • Related to; suggestive of; bordering on. 

  • Lying next to, close, or contiguous; neighboring; bordering on. 

  • Just before, after, or facing. 

prep
  • Next to; beside. 

  • Related to; suggestive of; bordering on. 

noun
  • Something that lies next to something else, especially the side of a right triangle that is neither the hypotenuse nor the opposite. 

apropos

adj
  • Of an appropriate or pertinent nature. 

  • by the way, incidental 

prep
  • Regarding or concerning. 

adv
  • To the purpose; appropriately. 

  • By the way. 

  • Timely; at a good time. 

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