kosher vs of right

kosher

verb
  • To kasher; to prepare (for example, meat) in conformity with the requirements of the Jewish law. 

adj
  • Fit for use or consumption, in accordance with Jewish law (especially relating to food). 

  • In accordance with standards or usual practice. 

adv
  • In a kosher manner; in accordance with kashrut. 

of right

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