fairly commonplace(Japanese fishermen accepted them as a part of everyday life and were well acquainted with them, with sightings being fairly commonplace. Throughout the 16th to 19th centuries, it was not considered particularly unusual for fishermen to tell of seeing these enigmatic beings swimming alongside their boats or attempting to steal fish from their nets. (mysteriousuniverse.org)ART Vancouver)
regular occurrence(In this day and age it seems to be a regular occurrence when people refuse to help others, they look the other way and refuse to become involved, however the same seems to be the case back in 1821 when Maria froze to death because no one would come to her aid. • As we will examine in a moment, it would appear that such fatal UFO incidents as the Grouse Mountain crash were quite a regular occurrence in the late 1940s and early fifties. (ufoinsight.com)wordpress.comART Vancouver)