remark vs underword

remark

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

  • make a remark 

  • A casual observation, comment, or statement 

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

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. 

underword

noun
  • A word placed below another, either literally or metaphorically: a subtext; an inadequate or subordinate term or description; a secret word or phrase; a watchword 

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