My wife and I both co-host podcasts. Hers, Lip Gloss and Laptops, comes out more often, on a regular weekly schedule, while mine, Inside Home Recording, is more sporadic, usually every two weeks, although it's been a month since our last show.
There are lots of reasons for that, mostly that they are very different programs about completely different topics (cosmetics and music recording, respectively), with entirely different production styles and workflows. I also have my own individual podcast here at Penmachine, which consists mostly of instrumental recordings I've made and released to the public, as well as some interviews, spoken-word segments, and other stuff. Because of my cancer treatment, I haven't added anything to that show in months.
Today, by coincidence, is the first time all three shows have a new episode out within the same 24 hour period, and on Halloween to boot. Go give them a listen: