It’s up to you! You can set your Autoinvest schedule to invest weekly, fortnightly, or monthly.
Alternatively, you can deposit money on a set schedule (weekly, fortnightly, or monthly) until you reach a specified amount and then your funds will be invested.
Although you can purchase free shares on pearler, it may be worth calculating the amount you should invest that is optimal to you due to brokerage fees. To work this out, simply use the Investing Frequency Calculator.