Here’s a polyrhythm of 9 over 6, or crotchet triplets in 3/4.
Once you’ve got that, try playing the rhythms in the boxes.
The last line implies a 2/4, or 4/4 pulse. If you take this rhythm over three bars of 4/4, then…
I’ve wasted my life.
Actually, no. It’s not a waste. There have been MANY occasions when that has been useful.