The word occurs only once in the "I Have a Dream" speech.
The name Freud occurs only once, on Sylvia's lips: "I … pin my faith on Mrs Vanderdecken [a society role model].
The second reason is that a given increase in government-supported farm prices generally occurs only once.
The annoying white-black-white flash when turning an E Ink page now occurs only once every six page turns.
"Those of us who have seen this film and understand it have experienced a phenomenon which occurs only once in a lifetime," Sellers wrote.
It's somewhat comforting to hear astronomers estimate that a black hole's consumption of a star occurs only once every 10,000 years in a typical galaxy.
Thus, despite the many generations produced in the summer by so-called sexual means, the reshuffling and recombination of genetic material occurs only once a year.
The final adjustment occurs only once the tournament is already underway — the program adjusts its power ratings based on the results of games played so far.
Typically, he said, projects in New Jersey are engineered to withstand the kind of storm that on average occurs only once every 75 years.
Transverse presentation, which occurs only once in several hundred labours, requires turning of the fetus before vaginal delivery or else delivery by cesarean section.
But the real problem was that Republicans were redrawing lines that had just been adopted in 2001, defying the rule that redistricting occurs only once a decade, after the census.
