Isikhathi sokulethwa silinganiselwa kusetshenziswa indlela yethu yobunikazi esekelwe ekubeni umthengi oseduze nendawo yento, isevisi yokuthumela ekhethiwe, umlando wokuthumela womthengisi, nezinye izici. Izikhathi zokulethwa zingahluka, ikakhulukazi ngezikhathi eziphakeme kakhulu.