on the mark vs scrupulous

on the mark

prep
  • Precisely accurate; correct or appropriate. 

scrupulous

adj
  • Having scruples or compunctions. 

  • Wrongly feeling guilt or anxiety about one’s morality; suffering from scrupulosity. 

  • Precise; exact or strict. 

  • Exactly and carefully conducted. 

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