around-the-clock vs nonstop

around-the-clock

adj

  • All day and night; all of the time. 

nonstop

adj

  • Without stopping; without interruption or break. 

  • Describing a point mutation within a stop codon that causes the continued translation of an mRNA strand. 

adv

  • Without stopping; without interruption or break 

noun

  • A linguistic sound that is not a stop; a continuant. 

  • A convenience store in parts of Europe, open 24 hours a day. 

  • A nonstop journey, especially a nonstop flight. 

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