The number of cycles per second (Hertz) (abbreviated as, hz) of anything that oscillates is called the frequency. The electricity of an AC wall outlet is said to have a frequency of 60 Hertz as it cycles negative then positive 60 times each second. Sound is an oscillating wave, but it has a broad range of frequencies. A low frequency sound (say, 50 hz) might sound like a low rumble, while a high frequency sound (say 12,000 hz), might sound more like a sizzle. A person with normal hearing can hear all the way up to about 20,000 hz.
The noun SECRETORY PHASE has 1 sense: 1. the second half of the menstrual cycle after ovulation; the corpus luteum secretes progesterone which prepares the endometrium for the implantation of an embryo; if fertilization does not occur then menstrual flow begins Familiarity information: SECRETORY PHASE used as a noun is very rare.
A secretarius was a person, therefore, overseeing business confidentially, usually for a powerful individual (a king, pope, etc.). As the duties of a modern secretary often still include the handling of confidential information, the literal meaning of their title still holds true. Origin. From the Renaissance until the late 19th century, men involved in the daily correspondence and the activities of the powerful had assumed the title of secretary.