This is a difficult question to answer definitively because there are many factors that can affect how often an unused toilet should be flushed.
Some of these factors include the age and condition of the toilet, the type of water supply (e.g., public or private), and the number of people using the bathroom.
In general, however, it is recommended that you flush an unused toilet at least once a week to prevent the buildup of bacteria and other potential contaminants.

Also, be sure to flush the toilet after each use, even if it is not being used frequently. This will help keep the bowl clean and free of debris.
If you have any questions or concerns about how often to flush your toilet, consult a plumber or another expert for guidance.
What are some of the consequences of not flushing a toilet?
If you do not flush a toilet for too long, the bowl can become filled with bacteria and other contaminants.
In addition, an unused toilet can start to emit an unpleasant odor. Therefore, it is important to flush an unused toilet regularly to avoid these issues.
In other words, flushing unused toilet is important to maintain hygiene.
This will help keep the bowl clean and free of bacteria and other potential contaminants.
How can you tell if your toilet needs to be flushed?
A toilet that is not flushed for too long can have salient characteristics. One of the signs is an unpleasant odor.
If your toilet is starting to emit an unpleasant odor, it may be time to flush it.
You may also notice that the bowl is starting to fill up with bacteria and other contaminants.
If this is the case, it is important to flush the toilet as soon as possible to avoid further contamination.
It is also a good idea to check the condition of your toilet regularly. If you notice any cracks or leaks, it is important to have these repaired as soon as possible.
Is there any benefit to flushing a toilet that is not being used?
Flushing toilets regularly, even when they are not being used, can help prevent the buildup of bacteria and other potential contaminants.
It can also help to keep the bowl clean and free of debris.
In addition, flushing an unused toilet can help to prevent unpleasant odors from developing.
Conclusion
Flushing unused toilets are important to maintain hygiene. Unused toilets should be flushed at least once a week and after each use.
This will help keep the bowl clean.
As mentioned in this post, there are some signs when an unused toilet needs to be flushed. If you see those signs, just flush your toilet.
Seeking help from a plumber can help you make better decisions.