I have to whine....trying to get people to learn and sing something just for four Sundays in a row once a year is what causes Catholics not to sing.
Worship aids can work miracles even for those who don't read music (getting people to look at them is another issue)
If it's worth repeating (and it should be) you can always sing it again next year, and the year after that, etc. I think annual repetition is as effective as weekly repetition--it just takes longer to establish the pattern.
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