Google Books Ngram Viewer

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

1650 - 1679 1680 - 1710 1711 - 1813 1814 - 1954 1955 - 2000 should English
1650 - 1680 1681 - 1705 1706 - 1794 1795 - 1926 1927 - 2000 shall English
1650 - 1685 1686 - 1715 1716 - 1815 1816 - 1955 1956 - 2000 must English
1650 - 1685 1686 - 1718 1719 - 1748 1749 - 1956 1957 - 2000 will English

Run your own experiment! Raw data is available for download here.
© 2013 Google - Privacy & Terms - About Google - About Google Books - About Ngram Viewer