sandblast vs scour

sandblast

verb
  • To spray with fast-moving solid grains (such as sand propelled by compressed air, although softer material like sodium bicarbonate used for delicate materials may also be so referred to). The process is used for stripping dirt, rust, paint etc. from the surface of objects. 

noun
  • Sand driven by a blast of air or steam for cutting and engraving figures on glass or metal. 

scour

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

  • 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 move swiftly over; to brush along. 

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

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 sandblast and scour occurred in a corpus of books? (source: Google Ngram Viewer )