For more about choosing the right words and phrases, see Ch. 6, p. 140. [[[LP x-ref: For more about choosing the right words and phrases, see “Choosing the Right Words and Phrases” in Ch. 6. ]]]
Over the centuries, a group of words and phrases have come to be associated with business correspondence; one common example is as per your request. These phrases sound stilted and insincere. Don’t use them. Figure 9.1 is a list of common clichés and their plain-language equivalents. Figure 9.2 shows two versions of the same letter: one written in clichés, the other in plain language.