Tom hasn’t played mahjong in ages.
Completely opposite meaning…
トムさんは長いことマージャンをやっていない。= Tom hasn’t played mahjong in ages. = The last time Tom played mahjong is like 5 years ago. Since then, he has NEVER played it.
トムさんはマージャンをやるのは久しぶりだ。= It’s been a while since the last time he played mahjong, and he is about to resume it.