fraction bar vs solidus

fraction bar

noun
  • The line separating the numerator from the denominator, whether horizontal, (sometimes proscribed) oblique, or diagonal. 

solidus

noun
  • The division line between the numerator and the denominator of a fraction, whether horizontal or oblique. 

  • Its successor Byzantine coins, from the eleventh century onward of progressively debased weight and purity. 

  • A Roman ~23k gold coin introduced by Diocletian in AD 301 and called by that name, but reissued at a slightly lower weight by Constantine I. 

  • The formal name of the oblique strikethrough overlay (as in A̷ and B̸) in Unicode. 

  • The weight of the Roman gold coin, 1/60 of a Roman pound under Diocletian or 1/72 lb. (about 4.5 grams) after Constantine. 

  • The line in a phase diagram marking the temperatures and pressures below which a given substance is a stable solid. 

  • A medieval French weight, 1/20 of the Carolingian pound. 

  • Synonym of slash ⟨/⟩, originally (UK) in its use as the shilling mark and now its formal designation by the ISO and Unicode. 

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