Each billing plan is billed differently.
For standard plan, you are billed on a monthly basis. Once your free trial is over, your membership will auto-renew and you will automatically be charged every month.
For season plan, you are billed every 3 months (quarterly basis). For annual plan, you are billed on a yearly basis.
If you choose to cancel your paid membership, you will no longer be billed but will retain full access to Nivite until the end of that given billing cycle. Note: Billing will take place on the same day each month for as long as you are a member.