How to countif to partial text

Is there a way to do a COUNTIF on just partial text?

I know how to count how many cells in a column contain the text "cars" for example, but how would i write a formula that include cells with other text as well?

For example if 55 cells have "cars" as a value
and 20 cells have "fast cars" as a value

I would want the formula to count 75.

Basically, it needs to count how many cells cars appears in, in a specific column, regardless of whether its alone in the cell or part of a sentence.

Thanks!