ngram_colorterms.png
This image displays a multi-line graph charting data over time. The background features a grid of light gray lines.

**Axes and Scale:**
The horizontal x-axis at the bottom represents years, marked in 20-year increments from 1800 to 2000. The vertical y-axis on the left represents percentages, ranging from 0.0000% at the bottom to 0.0200% at the top, with labeled intervals every 0.0020%.

**Data Series:**
There are five distinct colored lines plotted on the graph. Each line has a corresponding label printed in color next to its rightmost end point. The labels appear to use color names that do not match the ink color used for the text or the line itself in some cases.

1.  **The Top Line (Blue):** This is a blue line labeled "black" written in blue font. It generally stays at the highest position on the graph.
    *   From 1800 to roughly 1940, it fluctuates between 0.0100% and 0.013%.
    *   Around 1960, it drops sharply to below 0.0100%.
    *   It then spikes dramatically around 1975 to a peak near 0.016%, dips slightly, rises again to over 0.016% around 2000, and ends just above that level.

2.  **The Middle Cluster (Red and Orange):** Two lines track closely together in the middle of the chart.
    *   One line is reddish-brown. It is labeled "blue" written in red font.
    *   The other line is orange. It is labeled "green" written in orange font.
    *   Both start around 0.005% to 0.006%. They rise steadily until about 1920, reaching a peak near 0.008%. After 1950, they drop sharply to around 0.005%, where they remain relatively flat before rising slightly at the very end of the timeline.

3.  **The Lower Middle Line (Green):** This is a green line labeled "yellow" written in green font.
    *   It starts near 0.004%.
    *   It rises slowly to a peak around 1920, reaching about 0.0065%.
    *   After 1940, it declines steadily to about 0.003% and stays flat for the remainder of the timeline.

4.  **The Bottom Line (Dark Blue/Purple):** This is a dark blue or purple line labeled "gray" written in dark blue font.
    *   It starts very low, near 0.0005%.
    *   It rises slowly and steadily throughout the entire period, reaching a peak of about 0.0035% around 1940.
    *   It dips slightly after 1960 but ends the timeline rising again to just above 0.0020%.

**Additional Text:**
At the very bottom center of the image, below the x-axis labels, there is small text in parentheses that reads: "(click on line/label for focus)".
This description was generated automatically. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.