engobe vs precipitation

engobe

noun
  • A clay slip which is colored with metal oxides or stains, used for coating the surface of a pot either before or after bisque firing. 

  • A non-black clay slip coating applied to a ceramic body to give it decorative color or improved texture. 

precipitation

noun
  • A reaction that leads to the formation of a heavier solid in a lighter liquid; the precipitate so formed at the bottom of the container. 

  • Any or all of the forms of water particles, whether liquid or solid, that fall from the upper atmosphere (e.g., rain, hail, snow or sleet). It is a major class of hydrometeor, but it is distinguished from cloud, fog, dew, rime, frost, etc., in that it must fall. It is distinguished from cloud and virga in that it must reach the ground. 

  • A hurried headlong fall. 

  • Unwise or rash rapidity; sudden haste. 

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