Code to specify how to present time-series and Phillip's diagram graphics from FRED data.

Improved error handling.

Created by  CrEcTsRjb1hHQjHuumqRfqdbVV4X58iLEubi4noaDPFa  on August 1, 2021
53HEUVOVZQQCKIVT2NADM4PTGEMD5O7LJ3YGCPOIS54XXVTVDMVQC
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