Absolute vs plain sailing

Absolute

noun
  • That which is totally unconditioned, unrestricted, pure, perfect, or complete; that which can be thought of without relation to others. 

plain sailing

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

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

adj
  • simple, straightforward, or easy 

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