Epic Epoch

Epic Epoch is a simple script for tracking dramatic changes in the composition of a field over time.


How Epic Epoch works

It acts in three steps:

  • First, the N most frequently occurring entities are selected at each time period,
  • A frequency timeline is built for each of the selected terms
  • A bump graph shows the evolution of frequency and ranking through time

Epic Epoch: data description parameters


The variable you are interested in tracking in your database.

Size of the Hierarchy

The number of top entities to consider at each time period

Normalization of frequency count

Activating this feature will forgo raw frequency count and count in percentages

Epic Epoch: dynamics parameters

Number of time slices

Number of time periods in which you want to divide the visualization.

time slices distribution

Regular will cut into uniform periods of time. On the other hand, homogeneous will divide time frames so they contain the same number of documents (same parameter than:  time slices distribution).

Overlapping periods

This will allow the time slice distribution to overlap different time periods, particularly useful if you are using homogeneous distribution (same parameter than: Overlapping periods).

Bump Graph Analysis

Note: Clicking on any of the white rectangle dividers within a word’s journey will highlight it’s entire dynamics.