Is the use of "spare your time (to do something)" in a business letter appropriate? Does it sound formal or informal?

e.g. (in the body of a business letter) Please kindly spare your time to understand the following procedures...

Thnx
Full Member126
<> It doesn't sound idiomatic. I would not use it in a business letter. I might say something simpler.
Please note carefully the following procedures...
CJ
Veteran Member53,285
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CalifJim<> It doesn't sound idiomatic. I would not use it in a business letter. I might say something simpler.

Please note carefully the following procedures...
CJ
Does it sound negative at all, the word "spare"?
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