backslash vs notch

backslash

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).}} 

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

notch

noun
  • An indentation. 

  • A mountain pass; a defile. 

  • A discontinuous change in a taxation schedule. 

  • Woman. 

  • Such a cut, used for keeping a record. 

  • A level or degree. 

  • A portion of a mobile phone that overlaps the edge of the screen, used to house camera, sensors etc. while maximizing screen space. 

verb
  • To cut a notch in (something). 

  • To achieve (something); to add to one's score or record of successes. 

  • To join by means of notches. 

  • To record (a score or similar) by making notches on something. 

  • To fit (an arrow) to a bow by means of the notch cut at the end of the arrow; to nock. 

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