tarry for; await; cool one's heels; wait for(В.И.Макаров); wait; hang around until(*установленного срока или даты • It is standard and accepted practice on the part of government, institutions or private business, to provide advance notice of termination, date of departure, as well as a thank you for your services to a group or individual when walking papers are issued. If they don't want to hang around until next April, they are free to leave now. (vancouversun.com)ART Vancouver)
cool the heels(to remain in place in readiness or expectation of something (Merriam-Webster) | Англо-русский фразеологический словарь А.В. Кунина, М., 1984 – также в значении "заставить кого-л. дожидаться" и пр. варианты • That left open the possibility that someone was trying to sew up loose ends in El Paso in the hopes it might cool the heels of authorities. (mentalfloss.com)ART Vancouver)
whilst waiting for(A three-inch-long flying cockroach landing on my table – not what I was expecting to see whilst waiting for my meal! • Don't you love that these young ladies are getting in the mood with their reindeer hats, Rudolph noses and red mittens, whilst waiting for the Santa Claus Parade to begin?ART Vancouver)