### period | night:

Night sweat
* are a symptom with many causes
  - hot flashes that occur at night and are sometimes severe enough to disrupt sleep
  - quite unusual and more than likely are related to the underlying bowel disease
  - simply hot flashes that occur at night
* can have many varied causes.
* refer to a hot flash at night accompanied by profuse sweating.

Sleepless night
* are a way of life in the fast-paced world of a telecommunications startup.
* increase fatigue.
* result in daytime napping and fatigue, which interfere with quality of life.

Summer night
* Most summer nights are cool enough to sleep without the air conditioner, when windows can be opened.
* are cool and frosts can occur throughout the growing season
  - often cool at high latitudes, and northern bats avoid flying at low temperatures
* can be hot and hazy with few stars visible, even from remote locations.

Winter night
* can get cold and rain can occur well into spring.
* roosting occurs at sites where large numbers of eagles customarily congregate.

Nighttime
* Some nighttime is part of days.
* includes midnights.

### period | nighttime:

Nighttime lighting
* allows the garden to be used or viewed after dark.
* has much more contrast, or shadows, than daytime lighting.
* is important for passenger safety and security.

### period:

Old age
* brings certain physical changes as a normal aspect of aging
  - losses and diminishment
* can bring about roughness, fine wrinkling, and looseness of the skin.
* cause balds.
* disease that ought to be easier to cure than the freezing damage.
* does exactly that, although it is caused by no germ or virus.
* finds itself out of phase with the younger generations of children and grandchildren.
* flight of small cheeping birds skimming bare trees above a snow glaze.
* happens to all who survive long enough.
* impairs the beauty of our bodies.
* is also a tribal situation
  - an incurable disease
  - cherished as time to work toward salvation
  - contagious
  - less than two decades away, bringing eventual sickness and death
* is like birds in the winter
  - climbing a mountain
  - marked by a very low gradient in extremely broad, gently sloping valleys
  - misery
  - no barrier for successfully treating depression
  - regarded as a liability to the physical component of the human being
  - simply a solidification of the tissues, all of which become hard, dry and brittle
  - something that happens to other people
* is the antechamber of death
  - cause of sickness, and sickness is the cause of death
  - most unexpected of all the things that happens to a man
  - third stage in life when short hair is socially suitable to women
* is viewed as a time of losses in intellect, health, wisdom, etc
  - irreversible decay, decrepitude and loss of mental powers
* is when it takes longer to rest than to get tired
  - work lot less fun-and fun a lot more work
* means loss of physical power and is fatal to active leadership.
* spectator sport.
* time of losses and loneliness, and loneliness is no respecter of income
  - reflection, of recalling the events of a lifetime
  - to treasure

Past
* are history
  - memory
  - part of life
  - tenses
  - time periods
* is represented by various historical data, such as old maps

### period | past | old:

Old girl
* Most old girls can have kids.
* Most old girls have baby teeth
  - survive infection
* Some old girls are diagnosed with meningitis
  - commit suicide
  - die from infection
* Some old girls die in accidents
  - auto accidents
* Some old girls suffer from diseases
  - heart attacks
  - undergo brain tumor surgery

Old myth
* Some old myths take time to die.
* suggest trees grow larger in diameter when flooded.
* talk of fairies coming to live in the human world though rituals and ernest seeking.

Past research
* indicates that intertidal seaweeds can be nutrient limited.
* shows that eating enough calories is key to keeping the menstrual cycle regular.