either use the phrase editor arranger ( pattern length in phrase editor divided by lpb ofphrase editor = number of beats the phrase editor will play in the main pattern .
So if your phrase pattern is 24 lines and lpb 12 , a full cycle of your phrase is 16 lines or 2 beats ( when the main lpb is 8 )
Or set your phrase length to 10 and phrase lpb to 5 , your phrase cycle will again last for 2 beats ., and you can fill it up with quintuplets .
Other method requires a tool which spreads the notes evenly over a selection .
Fantastic tool
https://forum.renoise.com/t/new-tool-3-1-place-selected-notes-evenly/45426
The third method is to do it all manually with the note delay column .