Sentence:  In this case, the conjugate set contains "n"("n" − 1)/"x"("x" − 1) distinct sub-groups of <WSD>order</WSD> "m", and "H" is therefore self-conjugate in a group "K" of <WSD>order</WSD> "x"("x" − l)"m". 
Meaning of the word marked with <WSD> tags:  The cardinality, or number of elements in a set, group, or other structure regardable as a set.