Will there be a reason for the end to the dip?

I just started investing in late December, and the market is obviously down significantly since then. I have saved about 20% of my portfolio in cash since I didn’t want to through everything in at once (wishing I’d saved more now) but now I’m unsure when to put the rest in. For those who have significant experience in the stock market, do dips/crashes like this one generally end due to some sort of identifiable trigger, or is it just that on some random Wednesday the market decides “welp, I think I’ve gone down enough” and everything flips around? Are there generally a few days of sideways/relative stability at the low point, before things start to head back up? I know that time in the market > timing the market, but I’d definitely like to buy towards the low and not through the rest of my account in right before another big drop – which could happen since we haven’t even seen what the fed’s gonna do in March and throughout the year yet. And since I’m assuming people are going to say DCA, which is obviously phenomenal advice in general – what sort of time frame do you use when trying to DCA a lump sum? Break it into 4 investments or 10 or just a couple? Any advice is appreciated, thanks!