Honestly DC has had this problem also. Wonder Woman is promoted as one of the big three, but at the same time has problems maintaining a solo book in modern times. She never had runs approaching Batman, Superman, or even Green Lantern and Aquaman. The longest running solo modern DC female character is Catwoman.
But to give both Marvel, and DC credit they do keep trying.
Catwoman Vol. 1 - 4 issue mini
Catwoman Vol. 2 - 96 issues
Catwoman Vol. 3 - 83 issues
Catwoman New 52 - 53 issues
Wonder Woman Vol. 1 - 344 issues
Wonder Woman Vol. 2 - 228 issues
Wonder Woman New 52 - 53 issues
Where did you get 344? The last issue was 329 and there were no special issues to increase the count.
WW v.3 - 59 issues - not really sure why they decided to reboot/renumber after v.2, but the only reason it didn't run longer is because everything (including Action, Detective, Batman and Superman ) was cancelled to make way for the New 52.
Superman v.2 - 228 issues
Green Lantern v.1 - 38 issues
Green Lantern v.2 - 224 issues - including the reboot with continued numbering 4 years after the book was cancelled (after the 89th issue) and the title change to Green Lantern Corps at the end of the run
Green Lantern v.3 - 183 issues
Green Lantern v.4 - 67 issues
Aquaman? AQUAMAN? WTF?
v.1 - 63 issues - including the 7 that were added 6 years after the original cancellation
v.2 - 13 issues
v.3 - 77 issues
v.4 - 39 issues
plus a few minis
If you include issues 600-614 (there are considered part of V1) from 2010-2011 and the original run you get 344
329+315
Volume 1: 329
Volume 2: 226
Volume 3 : 44 (Post infinite crisis / one year later) in 2006
Got us to 599 so the revamp began with issue # 600