1 Corinthians 11:23-2823 For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread: 24 And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me. 25 After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me. 26 For as often as ye eat this bread, and drink this cup, ye do show the Lord's death till he come. 27 Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord. 28 But let a man examine himself, and so let him eat of that bread, and drink of that cup.
I believe this passage shows us the general priciple. That is, the frequency is not the issue, the heart condition is. "As often as ye eat/drink", to me, means "whenever you do it", i.e. no set, specific time frame.
The breaking of bread you mentioned, in Acts2:42, 46, is not necessarily referring to the Lord's Supper observance. I think Luke is trying to show the oneness of the believers at that time. It could be referring to communion, but I think that is a stretch.
Bottom line, frequency just doesn't matter, as long as it is observed, and observed with the proper heart condition. So, it is less Biblical, wrong, to observe the Lord's Table weekly, but with the wrong attitude, than it is to observe it quarterly, or even annually, but with the proper attitude.