select text from multiple combinations of text within a dataframe R

I want to subset data based on a text code that is used in numerous combinations throughout one column of a df. I checked first all the variations by creating a table.

 list <-  as.data.frame(table(EQP$col1))

I want to search within the dataframe for the text "EFC" (even when combined with other letters) and subset these rows so that I have a resultant dataframe that looks like this.

I have looked through this question here, but this does not answer the question. I have reviewed the tidytext package, but this does not seem to be the solution either.

How to Extract keywords from a Data Frame in R