crimson tide vs high tide

crimson tide

noun

  • menstruation 

  • red tide (type of algal bloom) 

high tide

noun

  • Synonym of menstruation 

  • The natural tide at its highest level for a particular tidal cycle at a certain place. 

  • climax, culminating point or phase 

  • The time of day when the sea has risen to its highest level. 

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