AMC SIP Minimum Time

I’m Willing to Do a Small Sip for Next 4 Months in ICICI Pru Tech or Tata Digital Ind Fund
I’m seeing AMC Sip’s Minimum amount is 100/150rs
Can i Please Know How Many Number of Amc sips should be Done in Order to Cancel/pause The Sip after 4 months
And I’m finding On Amc website That sip can be Done Weekly,Monthly too
Why Aren’t Zerodha’s Weekly Amc Sip’s Allowed?