scratch comma vs shilling mark

scratch comma

noun
  • Synonym of slash ⟨ / ⟩ in its former use as a form of comma. 

shilling mark

noun
  • Synonym of slash ⟨/⟩ in its use to mark the amount of shillings in a sum or (obsolete) in all its uses. 

How often have the words scratch comma and shilling mark occurred in a corpus of books? (source: Google Ngram Viewer )