amass vs lay up

amass

verb
  • To accumulate; to assemble. 

  • to gather a great quantity of; to accumulate. 

  • To collect into a mass or heap. 

lay up

verb
  • To store; to put by. 

  • To go out of active service. 

  • To make a layup with (a basketball) 

  • To deliberately leave the ball further than necessary from the hole, so as to secure an easier succeeding shot. 

  • To take out of active service. 

  • To disable or incapacitate; to confine to bed. 

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