Almost never, but it isn't the most important thing anyway. I can't really think of more than a couple of teams in college where the pitching calls are not in the end coming from the dugout. It is GREAT when you have one - but it is not a skill that is required and even when you have one, it is still should be a joint effort
The skill ALL pitchers, catchers and coaches NEED to learn is that pitch calling is a TEAM EFFORT. Catchers and pitchers should be openly providing input and feedback to the coach, should have the confidence to shake off a bad call and so forth. And coaches should be open to hearing it all and implement their feedback. Everything from batters stance, what pitches are working, what strategies they see, types of batters, etc, etc. Coaches have access to pitch charts/scouting/type of hitter/feel for how their pitcher is feeling/game situation, etc - and more and more info the higher the level or depth of competition.
DD's travel and HS coaches call the games but what pitches are called are based on built up understanding, conversations between innings and in game feedback on what is working/not working. Catcher and pitcher will waive off a pitch when needed - it used to happen all the time but at this point it might happen once or twice a weekend.
When my DD guests she calls her own game as a pitcher and but she loves having her whole battery and coaches involved.
Yes. I almost posted the same thing about it being a "team" effort the other day. Definitely the current trend in women's fastpitch seems to be having the coach calling the majority of the game from the dugout. When it's done well and is a cooperative, joint effort with everyone in tune with each other it can be a thing of beauty. I absolutely believe that when using this approach everyone can benefit from analyzing, questioning and "coaching" what was called and why. In my opinion, many of today's catchers are going to end up coaching at some level in their future and those that learn and have experience with the art of calling a game will be that much better off.
The flip side of the coin is the coach who doesn't fully understand the job or his staff and is calling pitches without much rhyme or reason behind his logic. This can be destructive and demoralizing for the battery and for the entire team.
Give the girls back the game, teach/coach them this aspect of it and everyone will be better for it...as a team!