double-cross vs rook

double-cross

verb
  • To betray or go back on. 

  • To cross twice in hybridization, as (A × B) × (C × D); for example, in commercial hybrid seed corn, A through D are classically inbreds, and their grandoffspring is the seed for sale. 

rook

verb
  • To cheat or swindle. 

noun
  • A cheat or swindler; someone who betrays. 

  • mist; fog; roke 

  • A castle or other fortification. 

  • A European bird, Corvus frugilegus, of the crow family. 

  • A rookie. 

  • A piece shaped like a castle tower, that can be moved only up, down, left or right (but not diagonally) or in castling. 

  • A type of firecracker used by farmers to scare birds of the same name. 

  • A trick-taking game, usually played with a specialized deck of cards. 

  • A bad deal; a rip-off. 

How often have the words double-cross and rook occurred in a corpus of books? (source: Google Ngram Viewer )