forward roll vs sprawl

forward roll

noun
  • A movement in which one's body is rolled forward, by putting the head on the ground and swinging the legs over the head. 

sprawl

noun
  • A defensive technique that is done in response to certain takedown attempts, where one scoots the legs backwards so as to land on the upper back of the opponent. 

  • An ungainly sprawling posture. 

  • A straggling, haphazard growth, especially of housing on the edge of a city. 

verb
  • To spread out in a disorderly fashion; to straggle. 

  • To scoot the legs backwards, so as to land on the upper back of an opponent attempting a takedown. 

  • To sit with the limbs spread out. 

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