come in vs observe

come in

verb
  • To function in the indicated manner. 

  • To begin transmitting. 

  • To enter. 

  • To finish a race or similar competition in a particular position, such as first place, second place, or the like. 

  • To finish a race or similar competition in first place. 

  • To become fashionable. 

  • To have a strong enough signal to be able to be received well. 

  • To join or enter; to begin playing with a group. 

  • To rise. 

  • To become relevant, applicable, or useful. 

  • To arrive. 

  • To fully develop. 

  • To become available. 

  • To give in; to yield. 

  • To surrender; to turn oneself in. 

observe

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

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

  • 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 come in and observe occurred in a corpus of books? (source: Google Ngram Viewer )