churn up vs rid

churn up

verb
  • To make the ground uneven, generally unintentionally. 

rid

verb
  • To free (something) from a hindrance or annoyance. 

adj
  • Released from an obligation, problem, etc. (usually followed by of). 

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