a pound to a penny vs probable

a pound to a penny

adv
  • Very likely; almost certainly. 

probable

adj
  • Supporting, or giving ground for, belief, but not demonstrating. 

  • Likely or most likely to be true. 

  • Likely to happen. 

noun
  • A person who is likely to appear or do a certain thing. 

  • Something that is likely. 

How often have the words a pound to a penny and probable occurred in a corpus of books? (source: Google Ngram Viewer )