fraught vs plain sailing

fraught

verb
  • To load (a ship, cargo etc.). 

adj
  • Distressed or causing distress, for example through complexity. 

  • Furnished, equipped. 

  • Loaded up or charged with; accompanied by; entailing. 

  • Laden. 

noun
  • Two bucketfuls (of water). 

  • A load; a burden. 

plain sailing

adj
  • simple, straightforward, or easy 

noun
  • The navigation of waters free from hazards or unfavourable winds. 

  • Something that is simple, straightforward, or easy; something that offers no troubles or difficulties. 

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