beaker vs milk churn

beaker

noun
  • A flat-bottomed vessel, with a lip, used as a laboratory container. 

  • A drinking vessel without a handle, sometimes for the use of children. 

  • A mug. 

  • A scientist. 

milk churn

noun
  • A tall, conical or cylindrical container for the transportation of milk. 

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