nonstop vs occasional

nonstop

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. 

adj
  • Without stopping; without interruption or break. 

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

occasional

noun
  • A person who does something only occasionally. 

adj
  • Created for a specific occasion. 

  • Acting in the indicated role from time to time. 

  • Occurring or appearing irregularly from time to time, but not often. 

  • Intended for use as the occasion requires. 

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