I performed the same Google Search as others and saw the instructions for the Eucharistic service that others saw.
I grew up Roman Catholic and it is interesting to recall my own memories. It was extremely rare when I was a child to actually receive the wine. Once a year, when we did receive wine, it was by intinction. It was not until years later that it became commonplace in Roman Catholic Churches to receive the wine in a separate cup.
I'd be interested to see some historical analysis on this but I think the practice of intinction was probably much more widespread prior to Vatican II and that one would find nearly no practice of using a cup in the regular service prior to this point. It was also much more common to use the trays that caught little crumbs that might have fallen from each host as well as the fact that the priest would place the host into each individual mouth.
The reason for this is quite simple. When the priest performs the sacrament of the Mass, he calls Christ down to the altar and the host becomes the literal body and blood of Christ. Christ's body is in the crumbs that fall and his blood in every drop that is spilled. If you've ever witnessed a Mass, one of the practices that is still carefully performed is that all the crumbs are swept into a chalice and the priest rinses it with holy water and drinks it. Also, the wine is not disposed.
In other words, there used to be far greater care in the handling of the host to prevent lay people from spilling Christ's blood or even having crumbs fall on the floor where mice could eat the crumbs and Jesus would be in a rat's stomach. I suspect that the Church set up special times for the use of actual wine for the lay people and the way to ensure Christ's blood would not be spilled was intinction.
I don't have time to research all of this to give documents but my own catechetical training as a child has put some of the above together. I also know that my brothers, who serve communion (another post Vatican II introduction) are trained to make sure the host actually goes into the mouth and that it is not carried outside the Church. This idolatrous belief has some really odd consequences that follow from GNC.