dough vs sour cream

dough

noun
  • A thick, malleable substance made by mixing flour with other ingredients such as water, eggs, and/or butter, that is made into a particular form and then baked. 

verb
  • To make into dough. 

sour cream

noun
  • Cream which has been treated with a benign bacterium to turn it slightly sour, often used as a condiment, or a topping for baked potatoes. 

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