I think that the limit should be set in the amount and not in the number of bets, because you can make two bets of 100 each, or you can make ten bets but of 10 each, so making more bets does not mean placing more. You can set more specific limits first by the amount, and if there is a need for this, then also by the number of bets. Twice a week this can be due to a limited number of suitable games, which can also be considered the right criterion.
I mean the limit of the amount not on the bet because as you said in one bet we can place two to five. The limit can probably be adjusted by each individual because the most important thing is how we can manage it well so that involvement in gambling is not excessive which can have a bad effect. Most fail to set limits because of the desire to get more wins and sometimes placing bets of one to five does not determine victory.
I explain based on individual experience and maybe you have a slightly better concept than us, so that it can help to make it easier so I think it is worth discussing based on some of the experiences of the gamblers themselves.