depressoid vs niggling

depressoid

adj

  • Depressing or miserable. 

  • Resembling depression. 

noun

  • A depressed or miserable person. 

niggling

adj

  • Irritating. 

  • Petty 

noun

  • A small irritating sensation. 

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