Based on data from 1991-2011 (when the number of tornadoes in the U.S. was accurately recorded) F4 and EF4 tornadoes averaged about 0.5% of all tornadoes.
There were 13 confirmed tornadoes in Ohio in 2008.
Ohio experienced 24 tornadoes in 1998.
There were 20 tornadoes in Ohio in 2014.
There have been many F4 and EF4 tornadoes. Tornadoes of this intensity have been known to hit the U.S., Canada, Mexico, The UK, Germany and are believed to have struck a number of others. The link below shows the locations of F4 and EF4 tornadoes in the U.S. from 1950 through 2010.
About 1.1% of tornadoes are rated F4, and less than .1% are rated F5.
A little more than 1% of tornadoes are rated F4 and F5 with F5 tornadoes being less than 0.1%
There were 20 confirmed tornadoes in Ohio in 2014.
Oklahoma has had the most F4 and F5 tornadoes. Though it is tied with Texas, Iowa, and Alabama in terms of F5 tornadoes in the past 60 years.
Ohio had 39 tornadoes in 2011. Final data should be released in early March.
The Palm Sunday tornado Outbreak produced violent (F4-F5) tornadoes in the states of Iowa, Illinois Indiana, Michigan, and Ohio. Four violent tornadoes occurred in the area around Goshen, Indiana while a pair of F4 tornadoes tore through a portion of southeastern Michigan. A string of tornadoes, one of which may have been an F5, tore a series of successive paths from near Lafayette, Indiana to near Cleveland, Ohio.
If you mean "Does freeborn county get tornadoes?" then yes. Freeborn county has a many tornadoes, some as as strong as F4. If you mean is there currently a tornado watch or warning, then no.