Wiktionary
bihourly
a. Occurring once every two hours. adv. Once every two hours.
Usage examples of "bihourly".
From trailing they had a very accurate model of the propulsion system's noise characteristics, and from the bihourly circling they had also built a picture of the boat's size and power plant specifications.
From trailing they had a very accurate model of the propulsion system’s noise characteristics, and from the bihourly circling they had also built a picture of the boat’s size and power plant specifications.