spattering vs sputtering

spattering

noun
  • Something spattered. 

sputtering

noun
  • A noise that sputters. 

  • The ejection of atoms from the surface of a solid or liquid following bombardment with ions, atoms or molecules; used to prepare a thin layer of material on an object. 

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