2
general::
see ACT ON (UPON); CALL ON (UPON); CHANCE ON (UPON); COME ACROSS (UPON); COME ON (UPON); COUNT ON (UPON); DAWN ON (UPON); DWELL ON (UPON); ENTER ON (UPON); FALL BACK ON (UPON); FALL ON (UPON); GROW ON (UPON); HARD ON (UPON); HIT ON (UPON); INCUMBENT UPON; LIGHT ON (UPON); ONCE UPON A TIME; PITCH ON (UPON); PLAY ON (UPON); PUT UPON; SEIZE ON (UPON); SET AT (UPON); TAKE IT UPON ONESELF; WAIT ON (UPON); WEIGH ON (UPON); WORK ON (UPON).
American Heritage Idioms