1.
i am trying to build a command that searches a text file
and outputs the number of words which consists of two 'b' characters
in each word separatly

like
barby

(the b characters must be separated from one another)
i tried to use grep [b][b] filepath
then i know that we need to use pipe to count the result

but it prints all the word with the two b chars
one next to the other

how do i build this command
2.
i am trying to build a command that searches a text file
and outputs the number words which consists of two 'x' characters
only
i tried to use