Why French ministries fell so quickly

Why did French ministries fall so quickly during the interwar period?

They needed the confidence of parliament, and coalition or minority governments could lose it rapidly.

The short ministries followed from the mechanics of parliamentary confidence. Most governments were coalitions or minority administrations rather than stable single-party majorities. Losing the support needed to command parliament could end a ministry and produce another rearrangement of many of the same political figures. The exchange connects constitutional structure directly to repeated changes in ministers, negotiating positions, and procurement priorities.