befall vs superate

befall

verb
  • To fall upon; fall all over; overtake 

  • To happen. 

  • To happen to. 

noun
  • Case; instance; circumstance; event; incident; accident. 

superate

verb
  • To cross; to surmount; to get over. 

  • To overcome; to conquer. 

  • To rise above; to overtop; to cover. 

  • To outdo; to surpass; to exceed. 

  • To overtake. 

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