infract vs observe

infract

verb
  • To infringe, violate or disobey (a rule). 

  • To break off. 

adj
  • Not broken or fractured; unharmed; whole. 

observe

verb
  • To take note of and celebrate (a holiday or similar occurrence); to follow (a type of time or calendar reckoning). 

  • To notice or view, especially carefully or with attention to detail. 

  • To comment on something; to make an observation. 

  • To follow or obey the custom, practice, or rules (especially of a religion). 

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