They meant within the patch cycle of the expansion. Currently, these span 2 and a half years.

Blue Mage released in 4.5 for example. It then received updates in X.15 and X.45 patches. Once it was almost max level, they only updated it once per expansion at X.45.

Thus, the precedents we have for Limited Job updates are: 7.15, 7.45 and 7.5. I assumed we would get the Blue Mage update at 7.15 this time so that we could get Beast Master's in 7.45 or 7.5, but it seems they will probably do them both together now. Or some different scheduling.