That's an old term and I always wonder about those Catholics. WHY bother to go at all if they only go twice a year? Doesn't the 3rd commandment say "Keep holy the Lord's Day"?
They DO know all about sins and confession. It seems pathetic to me.
I GUESS that people decide that keeping the Sabbath holy can mean ANYTHING they want. Sigh. So sad for them.
They usually regret it. Also, towards the end of their lives they start THINKING about eternity. We all hope that it's not "too little too late."
Almost everyone of the catechumens that I know of are outstanding Catholics no C&Es that I know of.
AMDG
In my observation, converts know what they are doing and very often have to overcome a significant anti-Catholic prejudice. The result is that those who complete the RCIA (the adult conversion process) have a strong faith and not likely to become tepid in their faith.
I was in RCIA over 20 years ago and the drop rate was significant. Many would come to inquire, stay for couple of months and would not come back. I remember several “seeker” types, who had tried everything else, from Baha’i to Presbyterianism that soon were on their way again. One guy was struggling with a drug addiction and was not interested in anything but his condition. Some had a serious problem with one doctrine or another and seemed to expect that someone would tell them that the Church did not really mean it. So the weaker types have many chances to drop off.