neat as a pin vs spotless

neat as a pin

adj

  • (simile) Very neat and tidy. 

spotless

adj

  • Exceptionally clean. 

  • Impeccable and free from blemish. 

  • Lacking spots; unspotted. 

How often have the words neat as a pin and spotless occurred in a corpus of books? (source: Google Ngram Viewer )