nonstop vs ongoing

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. 

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. 

adv
  • Without stopping; without interruption or break 

ongoing

adj
  • Continuing, permanent, lasting. 

  • Presently or currently happening; being in progress. 

noun
  • Something that is going on; a happening. 

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