HW patches had 6 storylines : MSQ, Raids Alliance, Raids, Trial story, Relics and Hildibrand (I don't know how the Ydillshire reconstruction worked, so I didn't count it).
SB patches had 7 storylines : MSQ, Raids Alliance, Raids, Trial story, Relics, Hildibrand and Doman reconstruction.
ShB patches had 6 storylines : MSQ, Raids Alliance, Raids, Trial story, Relics and Ishgardian restoration/diadem.
EnWalker has 4 : MSQ, Raids Alliances, Raids and Hildibrand. You could add the Tataru quests (probably should add the shcolasticates quest in HW or post roles-quests in ShB then).