Extract data from Google Books Ngram Viewer(https://books.google.com/ngrams/graph)

scrape.js

//This can be pasted into the chrome dev console to generate a comma seperated list
//of coordinates. This is copied to your clipboard and can be pasted into a CSV.
var children = document.getElementsByClassName("y axis main")[0].children;
var scaleStr = children[children.length - 2].children[1].innerHTML;
scaleStr = scaleStr.substring(0, scaleStr.length - 1);
var scale = 413 / parseFloat(scaleStr);
var data = document.getElementsByClassName("line visible clickable main")[0].getAttribute("d");
var coords = data.substr(1).split("L")
var msg = ""
for(var i = 0; i < coords.length; i++) {
	var x = parseInt(coords[i].split(",")[0]) / scale;
	var y = -(parseInt(coords[i].split(",")[1]) - 413) / scale;
	msg += "\n" + x + "," + y
}
copy(msg)