double date vs get on

double date

verb
  • To go on a double date. 

noun
  • A (romantic) date that two couples go on together. 

get on

verb
  • To progress (with). 

  • To handle, cope or manage (over time); to perform or make progress. 

  • To board or mount (something), especially a vehicle. 

  • To become late. 

  • To have a good relationship; to get along. 

  • To commence (an action). 

  • To become old. 

intj
  • Expresses surprise or disbelief. 

How often have the words double date and get on occurred in a corpus of books? (source: Google Ngram Viewer )