backboneless vs dough-faced

backboneless

adj

  • Cowardly, spineless. 

  • Without a backbone; invertebrate. 

dough-faced

adj

  • cowardly 

  • obsequious; fawning; pliable 

How often have the words backboneless and dough-faced occurred in a corpus of books? (source: Google Ngram Viewer )