the GNU version of the Collaborative International Dictionary of English
adj. Infrequent.
v. To cease to frequent.
The Century Dictionary and Cyclopedia
Not frequent; not common; not happening often; infrequent.
To cease to frequent.
Word Usage
"Appenfell was one of those mountains, not unfrequent, which is on one side abrupt and bounded by a wall of almost fathomless precipice, and on the other descends to the plain in a cataract of billowy undulations."