ミニスカートがすたれてもうしばらくになる。

mini-skirt

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to go out of use; to become obsolete; to die out; to go out of fashion

now; soon; shortly; before long; presently; already; yet; by now; (not) anymore; further; more; again; another; the other; interjection used to strengthen expression of an emotion (often exasperation)

little while; short while; moment; instant; a while; quite a time; it's been a long time

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...