chock vs pile up

chock

verb
  • To insert a line in a chock. 

  • To make a dull sound. 

  • To stop or fasten, as with a wedge, or block; to scotch. 

noun
  • Any fitting or fixture used to restrict movement, especially movement of a line; traditionally was a fixture near a bulwark with two horns pointing towards each other, with a gap between where the line can be inserted. 

  • Any object used as a wedge or filler, especially when placed behind a wheel to prevent it from rolling. 

adv
  • Entirely; quite. 

pile up

verb
  • To form a pile, stack, or heap. 

  • To collect or accumulate, as a backlog. 

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