backslash vs scour

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).}} 

scour

verb
  • To move swiftly over; to brush along. 

  • To (cause livestock to) suffer from diarrhoea or dysentery. 

  • To search an area thoroughly. 

  • To run with speed; to scurry. 

  • To clear the digestive tract (of an animal) by administering medication that induces defecation or vomiting; to purge. 

  • To clean, polish, or wash (something) by rubbing and scrubbing it vigorously, frequently with an abrasive or cleaning agent. 

  • To remove debris and dirt (from something) by purging; to sweep along or off by a current of water. 

noun
  • The removal of sediment caused by swiftly moving water. 

  • A place where wool is washed to remove grease and impurities prior to processing. 

  • A place scoured out by running water, as in the bed of a stream below a waterfall. 

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