back out vs boondock

back out

verb
  • To reverse (a vehicle) from a confined space. 

  • To withdraw from something one has agreed to do. 

  • To exit a mode or function. 

  • To draw from behind the back [+accusative = a knife etc.] (as also bare back). 

  • To undo (a change). 

  • Coordinate terms: cancel, call off, get cold feet 

  • See also: sell short 

  • To dare (someone) to not withdraw from a challenge. 

  • To bet on someone losing. 

  • Coordinate term: scare off 

boondock

verb
  • To stay in a self-contained recreational vehicle without connections to water, electricity, or sewer services, especially in a remote location. 

  • To camp in a dry brushy location. 

  • To strike a squopped wink and send it flying far away. 

noun
  • A brushy, rural area or location. 

  • A shot that strikes a squopped wink and sends it flying far away. 

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