observance vs remark

observance

noun
  • Observation or the act of watching. 

  • The practice of complying with a law, custom, command or rule. 

  • That which is to be observed. 

  • A rule governing a religious order, especially in the Roman Catholic church. 

  • The custom of celebrating a holiday or similar occasion. 

  • Reverence; homage. 

remark

noun
  • An act of pointing out or noticing; notice or observation. 

  • make a remark 

  • A casual observation, comment, or statement 

  • An expression, in speech or writing, of something remarked or noticed; a mention of something 

verb
  • To express in words or writing; to state, as an observation. 

  • To make a remark or remarks on, to comment on (something). 

  • To pay heed to; notice; to take notice of, to perceive. 

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