Explanation on the adverbs 'seldom, rarely, and never'?

Explanation on the adverbs 'seldom, rarely, and never'?

I've been searching for the explanation of those adverb of frequency (seldom, rarely, and never), but I didn't find an explanation that satisfy me. until finally I found a conversation on an English forum and I got a clear explanation about those adverb.
here it is the conversation.

Tenacious Learner:

Hi teachers,
Do you agree with this explanation? If not, could you rephrase it?
Even though the adverbs, seldom, rarely, and never, are used with an affirmative verb they can express a positive or a negative idea.

Thanks in advance

Clive:

Hi,

Please show us what you mean, by posting
- a sentence using 'never' with a positive meaning.
- a sentence using 'never' with a negative meaning.

Clive

Tenacious Learner:

Hi Clive,
Robert seldon arrives early at work. (negative meaning)
Kate seldon arrives late at work. (positive meaning)

They rarely read books. (negative meaning)
They rarely watch TV. They prefer to read. (positive meaning)

They never do exercise. (negative meaning)
They never overspeed. (positive meaning)
They are never late for class. (positive meaning)
He never arrives on time at work. (negative meaning)

Clive:

Hi,
I think you are using 'positive' and 'negative' in terms of how the reader feels about the sentence, instead of in a grammatical sense.

eg He seldom talks to Tom. You could perceive this as negative if you think he should talk to Tom, and positive if you think he should not talk to Tom.

eg He never wears blue. Same comment as above.

I don't recommend this kind of perception-based terminology.
I'd just stick with

He wears blue - positive
He never wears blue - negative

Clive

{Quoted from: https: //www.englishforums.com/English/ExplanationAdverbsSeldomRarely-Never/brnxcv/post.htm }
thank you very much.