observe vs pass by

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). 

pass by

verb
  • Of a period of time: to come to an end, to elapse. 

  • to drop by 

  • To travel past without stopping. 

  • To travel past (something) without stopping; to ignore, to disregard. 

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