The American Church Dictionary and Cycopedia
In the old rubrical usage of the Church, "Divine Service" always meant the Holy Communion, which was also called the Divine Liturgy. The central point of all Divine Worship, towards which all other services gravitate, and around which they revolve, like planets around the sun, is the great sacrificial act of the Church, the offering of the Blessed Sacrament of the Lord's Body and Blood.
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Miller, William James. Entry for 'Divine Service'. The American Church Dictionary and Cyclopedia. https://www.studylight.org/dictionaries/eng/acd/d/divine-service.html. 1901.