How often do you guys DCA into ETFs?

Hi all, I started to invest into VOO via FSMOne RSP in January 2025. I had a small amount of cash totaling RM 7000. I put in RM 5000 in January and then RM 1000 twice this month. I plan to set aside RM 1000 each month starting in March to DCA into VOO. Given the volatility if the stock market and FX conversion fluctuation right now, with a cost of RM 2 per trade would it be better to DCA RM 500 two weekly or RM 1000 once a month? It may sound like I am min-maxing but I would like to save every cent if possible.

Thank you all in advance!