HSA Contribution

Good Day!

We have a requirement that our HSA is half yearly payment. Like for example if in the first half year the employee will get 250 then second half year another 250.

As per the PS delivered we can update the employer limit in the table and it is by period basis.

If anyone hired in the month of March employer contribution will come out from March to December paycheck.

Our requirement is we need to send the HSA employer portion half yearly. What is the best way to approach this method?

Aslo if it needs to be once in a year employer contribution how can we do that?