The Nuttall Encyclopedia
E . fortieth), a name given to Lent because it lasts forty days, and assigned also to the first Sunday in Lent, the three Sundays which precede it being called respectively Septuagesima, Sexagesima, and Quinquagesima.
Wood, James, ed. Entry for 'Quadragesima'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/q/quadragesima.html. Frederick Warne & Co Ltd. London. 1900.