The short answer is twice in one day. A fuller explanation, though, will uncover not only how often we can receive, but more simply how we should approach the Most Blessed Sacrament.
St. Paul instructs the Corinthians that before receiving Holy Communion, they should discern whether they're worthy to receive (1 Corinthians 11:27-29). The Church has interpreted this to mean an examination of conscience, ensuring that we haven't committed mortal (grave) sin since our last confession. If we have, we should first go to confession before going to Communion.
Why do we use grape wine at Mass? Does is make a difference if it is red or white?
As spring approaches, we happily await berry season. While many of these berries will be eaten, some will be turned into different kinds of wine.
With so many wineries and individuals fermenting not only grapes but various fruits into wine, why does the Church exclusively use grape wine at Mass? Why not use another wine like cherry that looks more like human blood than red or white wine?