Here are two resources for how often churches should celebrate the Lord's Supper.

 

First, a statement from Charles Spurgeon's autobiography, "Spurgeon long held and taught that the apostolic precedents all appeared to indicate that the celebration of the sacred supper should take place each Lord’s day, and, therefore, whether at home or abroad, he always attended the communion every Sabbath if it was possible and he often bore his willing witness that the frequent participation in the holy feast increased rather than diminished its value as a constant reminder of Him who said to His disciples, ‘This do in remembrance of me.’ From C. H. Spurgeon Autobiography: Volume 2: The Full Harvest (Banner of Truth. 1973): p. 316

 

Second is a chapter that was posted on Justin Taylor's blog over at the Gospel Coalition by Kim Riddlebarger, entitled "The Reformation of the Supper," contained in "Always Reformed - Essays in Honor of W. Robert Godfrey