Is it on hiatus or in hiatus?

Hiatus is a noun meaning a gap, space, or blank; a pause or gap in a sequence, series, or process. Example sentence:The was a brief hiatus in the plant operation while they installed new equipment.

in.Perhaps it's regional; in the US we say "on hiatus."

Hiatus hernia?

hi⋅a⋅tus. 1. a break or interruption in the continuity of a work, series, action, etc. 2. a missing part; gap or lacuna: Scholars attempted to account for the hiatus in the medieval manuscript....

1. a break or interruption in the continuity of a work, series, action, etc. 2. a missing part; gap or lacuna: Scholars attempted to account for the hiatus in the medieval manuscript. 3. any gap or...