in-frequency (noun) infrequency: rarity
Sinonime: anachronous, antiquated, antique, archaic, back number, behind the times, dated, dusty, démodé, has-been, moth-eaten, musty, not with it, obsolete, old, old-hat, out, out-of-style, outmoded, passé, square,
tired, unfashionable,
vintageAntonime: current,
fashionable, modern, new,
popular, up-to-date