immigrant vs redemptioner

immigrant

noun
  • A non-native person who comes to a country from another country to permanently settle there. 

  • A plant or animal that establishes itself in an area where it previously did not exist. 

adj
  • Of or relating to immigrants or the act of immigrating. 

redemptioner

noun
  • An immigrant, generally from the 18th or 19th century, who gained passage to America by selling themselves as an indentured servant. 

  • Someone who redeems oneself, such as from debt or servitude. 

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