ad lib vs thought out loud

ad lib

adj

  • Extemporaneous, impromptu. 

verb

  • To perform without preparation. 

  • To perform without script. 

  • To perform extemporaneously. 

adv

  • Extemporaneously. 

  • At will. 

  • To whatever extent. 

  • At pleasure. 

thought out loud

How often have the words ad lib and thought out loud occurred in a corpus of books? (source: Google Ngram Viewer )