The English nouns, perseverance, information, are uncountable nouns (or "mass nouns), at least in their primary meanings.
With such terms, it is not proper to say that there is one perseverance, nor that there are many perseverances or many informations.2. Some dictionaries use the entry for a noun with the label [noncount] when it doesn't have a plural form or when it refers to something that can't be counted.
3. When a word can be used as both a singular noun and a plural noun, certain dictionaries will label it count, noncount.