If you specify Histogram analysis, Data Explorer performs a Histogram analysis (described in Histogram) on every specified input table column (of numeric or date type) where a Frequency analysis was not performed.
Histogram analysis is like bin-coding followed by a Frequency analysis. Bin-coding replaces numeric values with the histogram bin (or bar) into which the values fall (see Bin Code).
Data Explorer performs Frequency analysis as explained in Frequency Analysis, except for arranging the columns to analyze in ascending order of the number of values in each column. Although, arranging the columns is unnecessary because all columns have the same number of potential bins.
Date columns and their minimum and maximum values are based on the number of days since 1900.