As in, as common as it is portrayed in almost every tv show or story from that time
Hi, hopefully others can contribute here, but meanwhile you may be interested in a couple of previous answers
/u/petite-acorn in How violent was the Wild West?
/u/GeneralLeeBlount in How bad was the lawlessness and crime rate in the Old West in the 1850s-1890s compared to the "civilized" East in the same time period?