Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
Search in Google Books:

1800 - 1827 1828 - 1860 1861 - 1872 1873 - 1962 1963 - 2000 guttural English
1800 - 1923 1924 - 1977 1978 - 1981 1982 - 1993 1994 - 2000 velar English

Run your own experiment! Raw data is available for download here.
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