apropos vs at hand

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. 

at hand

prep
  • Currently receiving attention. 

  • Within easy reach; nearby. 

  • Near; soon 

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