kiasi vs pigeon-hearted

kiasi

adj

  • Unwilling to take a chance for fear that something bad or unfavourable will happen; cowardly. 

noun

  • A kiasi person. 

pigeon-hearted

adj

  • timid; easily frightened; chicken-hearted 

How often have the words kiasi and pigeon-hearted occurred in a corpus of books? (source: Google Ngram Viewer )