ditcu experimental gismu

x1 is the time-duration/interval/period/[elapsed time] of event x2.

short rafsi is -dit-. Cf. cedra, ranji, tcika, renvi, temci, canlu, kuspe, krafamtei

In notes:

ditcma
x1 takes a short time/has a short duration by standard x2
ditybra
x1 takes a long time/has a long duration by standard x2
krafamtei
x1 is the duration of x2.
zatra'i
r1=z1 exists over interval r2.