apropos vs within

apropos

prep
  • Regarding or concerning. 

adv
  • To the purpose; appropriately. 

  • By the way. 

  • Timely; at a good time. 

adj
  • Of an appropriate or pertinent nature. 

  • by the way, incidental 

within

prep
  • In the scope or range of. 

  • Before the specified duration ends. 

  • In the inner part, spatially; physically inside. 

adj
  • In the context of which the present document or ruling is made. 

adv
  • In or into the interior; inside. 

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