subservient vs suppletory

subservient

adj

  • Useful in an inferior capacity. 

  • Obsequiously submissive. 

suppletory

adj

  • Making up for deficiencies; supplementary. 

noun

  • A supplement. 

  • A source of supply. 

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