Sure it adds up, it just doesn't add up to very much is the deal. There might be just enough antifreeze at a wet weep hole to do the tried and tested method of antifreeze detection that the old timers used. Your tongue. Stick it on the wet part of a wet weep hole and if it tastes sweet then you have just identified antifreeze, be sure to spit it out as it's poisonous. Several times just to be sure it's all gone. Use your spit wetted finger as an intermediary if fuel filters, etc., prevent you from getting in there close enough to use your tongue directly.
As mentioned before you are only minus a few drops and it's way below detection levels.
Once upon a time I went to change oil in a 4640 that I had just roaded some 30 miles and was about to bushog a half section with it. With three buckets ready to catch oil the next morning I unscrewed the drain plug carefully, I was going to throttle the oil flow with the drain plug while I moved buckets under the stream. I got pure green antifreeze at first, but only one half cupful, and rest was all black as tar engine oil. That half cupful wasn't close to the oil pump so it could have accumulated there all winter drop by drop weeping on the coldest days. No harm, no foul. I told the owner, he had no comment.
Sleeves run warmer than the water and warm up first as well. Maybe that's why they dry up.