erosion vs scraping

erosion

noun
  • The gradual loss of something as a result of an ongoing process. 

  • A shallow ulceration or lesion, usually involving skin or epithelial tissue. 

  • One of two fundamental operations in morphological image processing from which all other morphological operations are derived. 

  • The result of having been worn away or eroded, as by a glacier on rock or the sea on a cliff face. 

  • The changing of a surface by mechanical action, friction, thermal expansion contraction, or impact. 

  • Loss of tooth enamel due to non-bacteriogenic chemical processes. 

  • Destruction by abrasive action of fluids. 

  • In morphology, a basic operation (denoted ⊖); see Erosion (morphology). 

scraping

noun
  • Something removed by being scraped. 

  • The sound or action of something being scraped. 

  • Automated collection of data, data scraping. 

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