noun, feminine/pɔʁ.sjɔ̃ kɔ̃.ɡʁy/plural: portions congrues
part of the tithe (dîme) paid by the higher clergy (haut clergé) to the members of the lower clergy (bas clergé) for their sustenance; allowances of the lower clergy; tithe, trifling amount (the smallest share, the meanest share, the bare minimum - and possibly even less than that: barely enough)
“réduire à la portion congrue” — to minimize, to cut, to reduce to practically nothing