1） 频因律 （ law of frequency ）：在其他条件相同的情况下，某种行为练习越多习惯形成越迅速。
2
?频次律
... law of fixation 固着律 law of frequency频次律 law of good pattern 良好模式律 ...
3
?频度定律
Raunkiaer 频度定律 ( law of frequency )： 在一个种类分布比较均匀一致的群落中、属于A 级频度种类通常是很多的，多于B、C和D频度 级的种类。
双语例句
1
Research shows that a uniform expression can be obtained according to the lawoffrequency separation and its revision with strain energy.
研究表明：在本次试验的情况下，频率分离法、频率分离法的应变能修正法可以变形成一个统一的模型表达式。
2
Moore's Law is the result of technological breakthroughs that reduce the size of transistors, coupled with manufacturing improvements that greatly reduce the frequency of defects.
摩尔定律是缩小晶体管尺寸的技术突破以及大大地降低了缺陷出现的频率工艺改进带来的结果。
3
But that obvious observation conceals a precise mathematical description: the link between the severity and frequencyof conflicts follows a smooth curve, known as a power law.