locking ramp over multiple bars

With a [phasor 1n @lock 1] it is possible to lock and sync the phasor to a whole note. Does anybody know of a simple way to achieve something similar over 4 whole notes? I tried with rate~ but the syncing doesn't satisfy me. I want to be sure that in this case at every 4th whole note, the ramp restarts, also after a stop and start. Thanks.