bending vs forward roll

bending

noun
  • A motion or action that bends. 

  • An instance of something being adapted or distorted. 

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. 

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