D. Peculiar use of set expressions

In language studies there are two very clearly-marked tendencies that
the student should never lose sight of particularly when dealing with
the problem of word-combination. They are 1 ) the analytical
tendenсу, which seeks to dissever one component from another and 2) the synthetic tendency which seeks to integrate the parts of the combination into a stable unit.

These two tendencies are treated in different ways in lexicology and
stylistics. In lexicology the parts of a stable lexical unit may be sepa-
rated in order to make a scientific investigation of the character of the
combination and to analyse the components. In stylistics we analyse
the component parts in order to get at some communicative effect sought
by the writer. It is this communicative effect and the means employed to achieve it that lie within the domain of stylistics. The integrating tendency also is closely studied in the realm of
lexicology, especially when linguistic scholars seek to fix what seems
to be a stable word-combination and ascertain the degree of its stabil-
ity, its variants and so on. The integrating tendency is also within
the domain of stylistics, particularly when the word-combination has
not yet formed itself as a lexical unit but is in the process of being so
formed.

Here we are faced with the problem of what is called the cliche.