Copy-editing Puzzle

A really old puzzle from DaveNet. How old? I remember attending a company retreat in the mid 80s run by Jack Faris before he was famous and powerful at which he had us do it.

FINISHED FILES ARE THE RE-

SULT OF YEARS OF SCIENTIF-

IC STUDY COMBINED WITH

THE EXPERIENCE OF YEARS.

Read the text above and then count the number of times the letter F appears. How many did you count? Find the answer here.