Google Books Ngram Viewer

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

1700 - 1747 1748 - 1851 1852 - 1864 1865 - 1904 1905 - 1950 oir Spanish
1700 - 1725 1726 - 1751 1752 - 1763 1764 - 1937 1938 - 1950 oír Spanish

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