backslash vs derogate

backslash

verb
  • To escape (a metacharacter) by prepending a backslash that serves as an escape character, thereby forming an escape sequence. 

noun
  • The punctuation mark \. 

  • Used erroneously in reference to, or in reading out, the ordinary slash, that is, the punctuation mark /. 

  • |passage= […] I was trying to find a web-site for which I had been given the following address: http://www.isop.ucla.edu/pacrim/pubs/korjournal.htm. […] I began to work backwards, removing first the last part of the address following the last backslash (/korjournal.htm).}} 

derogate

verb
  • To take away (something from something else) in a way which leaves it lessened. 

  • To remove a part, to detract from (a quality of excellence, authority etc.). 

  • To act in a manner below oneself; to debase oneself. 

  • To detract from (something); to disparage, belittle. 

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