Last time we looked at using ‘much’ with uncountable nouns and ‘many’ with countable nouns. There are some more words which can be used only with one of the types of nouns. Here’s a table to help you, with some examples.
|little, less, least||no||yes||little energy|
|few, fewer||yes||no||few people|
|many, several||yes||no||several surprises|
In spoken English you may hear people use “less” with countable nouns, and you’ll probably see it in the supermarket checkout queue (5 items or less). This is not standard English and you should definitely avoid it in writing.