Marshal vs Moor

Marshal

name
  • A male given name transferred from the surname, of 19th century and later usage. 

  • An English and Scottish status surname from Middle English for someone who was in charge of the horses of a royal household, or an occupational surname for someone who looked after horses, or was responsible for the custody of prisoners. 

Moor

name
  • An English surname transferred from the given name. 

  • A surname from Irish. 

noun
  • A member of an Islamic people of Arab or Berber origin ruling Spain and parts of North Africa from the 8th to the 15th centuries. 

  • A member of an ancient Berber people from Mauretania. 

  • A person of an ethnic group speaking the Hassaniya language, mainly inhabiting Western Sahara, Mauritania, and parts of neighbouring countries (Morocco, Mali, Senegal etc.). 

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