R help - May 2017 - Alternative function for Dictionary ( )

All,

Since the Dictionary () function is no longer available with the tm package. How
do I use other functions to do the same as below? I want to capture a list of
specific terms from a corpus. By example, if my corpus has 100 files. I want to
see a list with
occurrences of price, crude, oil in all 100 files.

d <- Dictionary(c("prices", "crude", "oil"))
inspect(DocumentTermMatrix(reuters, list(dictionary = d)))

Thanks

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