While I complied, he, not comprehending a single word, would stand before the fire surveying me with the air of an Exhibitor, and I would see him, between the fingers of the hand with which I shaded my face, appealing in dumb show to the furniture to take notice of my proficiency.
There are no more uses of "proficiency" in the book.
Show samples from other sources
Not as well as my mother, but I’m pretty proficient."
Kiera Cass -- The Heir
Yvette was by far the most competent of my coworkers, and she and I would often work together on any electrical job requiring proficiency with tools.