amass vs put by

amass

verb
  • To collect into a mass or heap. 

  • to gather a great quantity of; to accumulate. 

  • To accumulate; to assemble. 

put by

verb
  • To store, or place in reserve; to save (money, etc.) for later use. 

  • Of a ship: to be run aground intentionally to avoid a collision 

  • To perform an action without attracting the attention of. 

  • To remove (something) from the present context and into its proper place; (figurative) to reject or disregard. 

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