From a purely dataviz standpoint, this is a fail. The optimal visualization would allow for all 3 terms to be shown on the same graph, or at least the same page. 3 distinct graphs could be a decent comparison, if the y-axis remained constant. But since it doesn't, every graph peaks at the same approximate height, so really the only thing an end-user, seeking a comparison of similar concepts/terms, would likely find useful is the max displayed value on the y-axis.

I recognize this is little more than a proof-of-concept at this point, so perhaps "fail" is a strong word, but hey, it's what the author chose to submit.

This is a fair criticism and from the feedback represents a fairly major missing functionality in the site. For what it's worth I only realised this might be a useful feature after I finished version 1. From my write up[0]: "Allow multiple trends on the same plot. It would be interesting to compare Kubernetes with Docker directly, or PyTorch with Tensorflow to get an idea of the relative trends in attention".

Initially I built the front end to analyse a single term (recession) rather than for trend comparison but it would definitely be useful and I'll look at adding it.

[0]: https://eliot-jones.com/2020/1/hackernews-trends

I've pushed an update that allows you to display multiple trends on the same plot now, if you wanted to take a look.