around-the-clock vs continuant

around-the-clock

adj

  • All day and night; all of the time. 

continuant

adj

  • Continuing; prolonged; sustained. 

noun

  • An endurant. 

  • A determinant formed from a tridiagonal matrix. 

  • A linguistic sound other than a stop. 

How often have the words around-the-clock and continuant occurred in a corpus of books? (source: Google Ngram Viewer )