# Who invented the "Histogram"?

While going through Wikipedia's article History of statistics

I found

In 1786 William Playfair (1759-1823) introduced the idea of graphical representation into statistics. He invented the line chart, bar chart, and histogram and incorporated them into his works on economics, the Commercial and Political Atlas.

William Playfair(22 September 1759 – 11 February 1823) invented the line chart, bar chart, and histogram.

And in the Histogram article

A histogram is an approximate representation of the distribution of numerical data. It was first introduced by Karl Pearson.

From ine.es

academic and learned online publications, take this extract from an online entry for “Karl Pearson: “Two days later he [i.e., Pearson] introduced the histogram – a term he coined to designate a 'time-diagram' to be used for historical purposes”

Histogram was first introduced and coined by Karl Pearson(27 March 1857 – 27 April 1936).

The context is not clear and I'm a bit confused on the invention of Histogram.

Does anyone know who first invented/introduced a Histogram? I would be happy to receive any additional reference from you.

• History of ideas is too complicated to be left to amateurs... and I am one too. Pearson's contribution was the term histogram, not the idea. I don't know that Playfair ever had a histogram modern sense, and others were there earlier than Playfair with bar charts. Guerry, A.-M. 1833. Essai sur la Statistique Morale de la France. Paris: Crochard.has also been suggested as if not the first, then an early user of histograms. Aug 14, 2020 at 8:03
• Parsing "histogram" as intended to mean time diagram or history diagram (which I have also seen) is utter nonsense. The root histos here implies being upright, and also occurs differently in histology. So, if as I have occasionally done, you present a histogram with horizontal bars, then it's on this etymology not a histogram, but I have not seen that objection. Full non-disclosure. I use Wikipedia just about every day with gratitude and yet distrust it mightily on anything close to my home territory. Aug 14, 2020 at 8:08
• @NickCox Thank you for the comments. Aug 14, 2020 at 9:05
• Line charts go back before Playfair too. Aug 14, 2020 at 9:46