Visualizations:

Time series for narratively dominant 1-grams and 2-grams:

Computational time series for narratively most dominant 1-grams at day scale:

Computational time series for narratively most dominant 2-grams at day scale:

Computational time series for top 10 narratively most dominant 1-grams at day scale:

Computational time series for top 7 narratively most dominant 2-grams at day scale: