craven vs obsequious

craven

adj
  • Unwilling to fight; lacking even the rudiments of courage; extremely cowardly. 

verb
  • To make craven. 

noun
  • A coward. 

obsequious

adj
  • Excessively eager and attentive to please or to obey instructions; fawning, subservient, servile. 

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