This is compared to the time step that is inherent in {TAIL ~ a user} desired {HEAD ~ frequency schedule} 
This is compared to the time step that is inherent in { TAIL ~ a user } desired { HEAD ~ frequency schedule }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD