I was using the CSB for these searches because that was used in the post I was trying to answer. Why do these two search arguments produce different results i.e. why is the label missing in 3 instances? Yes, I understand that the label is applied only if the role of King is relevant in context but "year of" is clearly a reference to the reign i.e. kingship of Hoshea - you don't refer to the year of Methuselah.
- person:"Hoshea (king)"
- regent:(agent:person:"Hoshea (king)" AND role:King)
The first discrepancy I can invent a theory for but the second two appear to be errors - I think Hoshea was King of Israel not Assyria but ....
