https://writingya.blogspot.com/2012/08/is-triweekly-word.html
Finding Wonderland: The WritingYA Weblog (archive): Is "Triweekly" a word?
...the reason I ask is that it seems my Toon Thursdays have moved to a tri-weekly format. There is just TOO MUCH STUFF happening this summer...
archive isfindingwonderlandweblogtriweekly