# per vs PF

> English confusable word pair

## The two words

### per
*preposition · IPA /pɜː/ · frequency rank #339*
For each.

### PF
*noun · frequency rank #16,301*
Initialism of pilot flying, a pilot currently in control of the flight trajectory of the aircraft, as opposed to pilot monitoring.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/per-vs-pf