Also interesting, the 1700s were not kind to the numbers "six" or "seven": http://ngrams.googlelabs.com/graph?content=one%2Ctwo%2Cthree%2Cfour%2Cfive%2Csix%2Cs

Also interesting, the 1700s were not kind to the numbers "six" or "seven": http://ngrams.googlelabs.com/graph?content=one%2Ctwo%2Cthree%2Cfour%2Cfive%2Csix%2Cseven%2Ceight%2Cnine%2Cten&year_start=1700&year_end=1820&corpus=0&smoothing=3 http://ngrams.googlelabs.com/graph?content=one%2Ctwo%2Cthree...