IBF: Kovalev - 696 days Brook - 780 days DeGale - 500 days WBO: Kovalev - 1144 days Inoue - 644 days Crawford - 535 days WBA: Rigondeaux - 2152 days Lebedev - 1796 days GGG - 2182 days WBC: Stevenson - 1214 days Yamanaka - 1794 days Menayothin - 698 days Numbers from wiki, feel free to correct if needed.
GGG holding it 2182 days isn't that impressive when you consider Andre Ward held the Super Middleweight title for longer than that without actually defending it. Golovkin needs to up his inactivity levels and take Tom Loffler to court.
When you consider you are adding GGGs WBA regular reign with his WBA Super reign it isn't that impressive. Why don't you just have the amount of days he was WBA Super Champ instead of glorified #1 Contender?