Winner for U was "Ultrasonic ukuleles underimpress users" submitted by Erin.
Submit V sentences by Wednesday, October 26, using comments on this post.
Origins: ? (1)
Greek: none
Frequency: 21st most frequent letter in English (2)
"V" from Samuel Johnson's Dictionary of the English Language (1755): "Has two powers, expressed in modern English by two characters, V consonant and U vowel, which ought to be considered as two letters; but as they were long confounded while the two uses were annexed to one form, the old custom still continues to be followed. V, the consonant, has a sound nearly approaching to those of b and f. With b it is by the Spaniards and Gascons always confounded, and in the Runick alphabet is expressed by the same character with f, distinguished only by a diacritical point. Its sound in English is uniform. It is never mute." (3)