kindly ask for help to build a redstone circuit for Java that periodically activates and deactivates i.e. a dispenser with a water bucket in it, so that it stays active for a short time (2-3 seconds) and stays passive for let's say 1 minute.
I tried with combining 2 hopper clocks but I couldn't get it working.
The dual hopper clock used in this vid by Snocrash is very simple and allows for easy tuning of the on/off cycles by adjusting the number of articles in the hoppers. Think he tuned this for 10 sec. on and 30 sec. off but by adding more articles to first hopper set and fewer to second, would match your specs.