noun, feminine/ɡʁa.tɥi.te/plural: gratuités
the quality of being provided gratis, of being free of charge; the quality of being gratuitous (unwarranted or unjustified); gratuitousness; the quality of being gratuitous (without necessity or reason); gratuitousness
“La gratuité de l'école publique en France.” — The fact that public school is free of charge in France.