factual vs kosher

factual

adj
  • True, accurate, corresponding to reality. 

  • Pertaining to or consisting of objective claims. 

kosher

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

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. 

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