rick vs unstack

rick

noun
  • A brand new (naive) boot camp inductee. 

  • Straw, hay etc. stored in a stack for winter fodder, commonly protected with thatch. 

  • A stack of wood, especially cut to a regular length; also used as a measure of wood, typically four by eight feet. 

verb
  • To heap up (hay, etc.) in ricks. 

  • To slightly sprain or strain the neck, back, ankle etc. 

unstack

verb
  • To remove from a stack. 

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