Ones or One's or Ones' (Correct Possessive Explained)
We use it when writing "one" as a pronoun (which is rare but doable). There are no cases where "ones'" is correct because this would be the plural possessive, and we can't use pronouns in the plural form. Let's look a little closer at all the relevant forms of "one." ... The singular and plural forms make sense.
One of the rare case or One of the rare cases

As we can see from the illustration, 1S In Rare Cases has many fascinating aspects to explore.
Learn the correct usage of "One of the rare case " and "One of the rare cases " in English. Discover differences, examples, alternatives and tips for choosing the right phrase.
Learn the correct usage of " in a few cases " and " in rare cases " in English. Discover differences, examples, alternatives and tips for choosing the right phrase.

One's or Ones
However, some rare circumstances exist in which people may use the plural possessive to refer to a group of people or objects they referred to in a previous sentence.

Such details provide a deeper understanding and appreciation for 1S In Rare Cases.
As a result, these cases drop in a very high quantity and they are typically the cheapest weapon cases on the market. This drop pool consists of a few cases as shown below.
More Context About 1S In Rare Cases
Rare Michael Jordan 1s from 'Bad Boys' rivalry era nets more than $200K at auction | WGN-TV. For 1S In Rare Cases, this point helps readers notice the most relevant visual details before moving into the gallery.
Rare Jordan Colors. This note connects the source idea with the visuals in a simple, reader-friendly way.
10 Rarest Air Jordan 1s Ever Made - Rarest.org. This note connects the source idea with the visuals in a simple, reader-friendly way.
Looking at multiple sources also helps separate the main idea from small decorative details.
These notes are added so the page offers more than images and gives each visitor a clearer reason to keep reading.