shelve vs spin down

shelve

verb
  • To set aside; to quit or postpone. 

  • To place on a shelf. 

  • To furnish with shelves. 

  • To slope; to incline; to form into shelves. 

  • To have sex with. 

  • To take (drugs) by anal or vaginal insertion. 

noun
  • A rocky ledge or shelf. 

spin down

verb
  • To diminish in energy; to slow down or peter out; to be gradually canceled or ended. 

  • To reduce its speed of rotation. 

  • To reduce its spinning speed from that required for reading and writing. 

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