furtive vs vulpinary

furtive

adj
  • Of a person or an animal: sly, stealthy. 

  • Of a thing: done with evasive or guilty secrecy. 

  • Of a thing: that has been acquired by theft; stolen; also (generally) taken stealthily. 

  • Of a person, etc.: inclined to steal; pilfering, thieving. 

vulpinary

adj
  • Crafty, sly, shrewd. 

  • Not spiritual or religious; common. 

  • Relating to a fox. 

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