@serah Smartphone comes out in Japan fairly regularly. Other titles, not so much.
Grimgar, released 14+, 14++, and 15 fairly close together. JNC is in process of translating 14++ now. I almost expect 16 to be out before 15 is finished.
Mixed Bathing and Otherworld Magic both went well over a year between volumes. Both series easily caught up to Japan.
That doesn't even consider the normal back and forth that goes on when licensing a new volume. Patience is a necessity. JNC is still faster and more consistent than some publishers.