https://www.ou.org/holidays/the_essence_of_a_fast_day/
Aneinu & The Essence of a Fast Day - Jewish Holidays
Aug 2, 2017 - Why do we say Aneinu on both a public fast day such as Tisha B'Av and a private fast day such as for a dream or a yahrtzeit, aren't the purposes different?
the essenceof afast dayjewish holidaysaneinu