lay away vs squirrel away

lay away

verb
  • To reserve (something) for the future. 

  • To put (something) on layaway. 

  • To bury (someone). 

squirrel away

verb
  • To stash or hide; to hoard, collect, save, or accumulate; to create a reserve, stash, or hoard of some supply. 

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