Frequent Communion is the Roman Catholic practice of receiving the Eucharist frequently, as opposed to the usual medieval practice of receiving it once or a few times a year, by going to mass on Sundays.Frequent Communion - Catholic Encyclopedia article
Although it is argued that in the early church the norm was communion of all Christians present at Mass, before the Twentieth Century communion among the Catholic laity tended to be quite infrequent, sometimes only once a year. In the early modern period, this was partly informed by the Jansenist fear that frequent communion would erode the faith.Casarella, Peter J., "Eucharist and Sacrifice: Spiritual Renewal in Early Twentieth Century", The Oxford Handbook of Sacramental Theology, (Hans Boersma, Matthew Levering, eds.), OUP Oxford, 2015
In the early Twentieth Century this began to change. Pope Leo XIII in his encyclical Mirae caritatis in 1902 argued for frequent communion as a source of renewal of faith with his successor Pius X arguing in his motu proprio Sacra TridentinaA Decree on Frequent and Daily Reception of Holy Communion - https://www.catholicculture.org/culture/library/view.cfm?recnum=5195 that the laity should receive communion as frequently as possible. In his encyclical Quam singulari Pius also relaxed restrictions on reception of Communion for the sickCommunion of the Sick - Catholic Encyclopedia article and children.QUAM SINGULARI - Papal Encyclical
Regarding weekly versus daily communion, St. Francis de Sales encouraged weekly communion, but he neither encouraged nor discouraged daily communion.
References
Bibliography Antoine Arnauld, De la fréquente communion (1643)