Butts realized that the key to Lexiko would be a formula for distributing the vowels and consonants, and assigning them point values, that represented their relative frequency in educated English usage.
We did not, however, show that a mutant with a higher efficiency could invade a population, replace its ancestor, and ultimately end up at a lower relative frequency in the population than its ancestor.
Some naturally occurring genes have evolved methods of significantly improving these odds: These selfish genes can increase in relative frequency in a population, even while reducing the likelihood that an organism will reproduce.
Conclusion: Coronary-subclavian steal syndrome occurs with relative frequency in noncardiac surgery patients with prior coronary artery bypass graft surgery using internal mammary artery conduits.
There is evidence of this effect in regard to some microbial communities exposed to antibiotics35, in which a population of antibiotic-resistant and antibiotic-sensitive types depends on the efficiency with which resistant types break down the antibiotics, and decreasing the efficiency of resistant types increases their relative frequency in the population.
The best-known formula for studying relative word frequencies was proposed by the American linguist George Zipf in Selected Studies of the Principle of Relative Frequency in Language (1932).
This supposition was tested by examining differences in the habitat and autecological characteristics of woodland plants according to their relative frequency in hedgerows and woodlands using a novel Habitat Preference Index (HPI).
The following quantitative characteristics have been monitored: Area (P) in hectares or as a percentage of the categories, Relative frequency of landscape elements (fragmentation) in No ha−1, Relative frequency in No ha−1, and Average size of the elements in hectares.
The success of a strategy is measured by its relative frequency in the population at any given time.
Many comorbidities associated with migraine have a higher relative frequency in chronic migraine (CM) than episodic migraine (EM).
Migraine is comorbid with various conditions, many with a greater relative frequency in chronic migraine (CM) versus episodic migraine (EM).
