The word like can be used as a noun

Question

A : This is something that we have been doing for the past 7 months. And this is something that I have been doing for like more than 5 years.

This is A's talking in front of somebody. I want to translate the second sentence :

I prepared after targeting the completeness which can be obtained from our 5 years or more labors

= This is something that I have been doing for like (or completeness) that we have been doing more than 5 years

= This is something that I have been doing for like more than 5 years.

Answer 1

This is something that I have been doing for like more than 5 years.

I can interpret this two ways.

1. Like can be a filler word, similar to um or uh, that has essentially no meaning but gives the speaker more time to think what they want to say next.

2. If spoken more deliberately, like can mean "about" or "approximately". B may be saying that they have been doing something for approximately 5 years. Using "like" in this sense together with "more than" is a bit illogical, but real-world speech often is.

Answer 2

Like is used a noun in the context of social media sites like Facebook. (The post has hundreds of likes.) But it's not being used as a noun in the sentence in the question.

In the sentence in the question, it's modifying an adjective, so it's being used as an adverb in general, and as an interjection specifically.

From Merriam-Webster:

like adverb
4 : NEARLY, APPROXIMATELY
// the actual interest is more like 18 percent
—used interjectionally in informal speech with expressions of measurement
// it was, like, five feet long
// goes there every day, like

In the example in the question, like is being used as an interjectional adverb to modify an expression of the measurement of time.

Also, although the use of commas is stylistic, it would probably be more common to use them in this case:

And this is something that I have been doing for, like, more than 5 years.