Your payment frequency will depend on the partners you work with.
If you do TVDE, you can receive your money weekly or monthly, depending on what is most convenient for you depending on the value of the deposit.
If you want to work with Mercadão, DPD or Correos you can receive your money monthly.
If you want to work with Uber Eats or Bolt Food you can receive your money weekly.
All payments are made by bank transfer, after submitting the respective tax documents - invoice or green receipt - depending on your contribution status (if you are a tax entity or self-employed worker).
Be sure to consult more detailed information about Issuing and Submitting your invoice/receipt.
Consult the Obligations and Changes you may have throughout your professional career: VAT and IRS.