A unit of measurement is a definite magnitude of a quantity,
used as a standard for measurement of the same kind of quantity. Any other quantity of that kind
can be expressed
as a multiple of the unit of measurement.

Length,
for example,
is a physical quantity.

Any value of a physical quantity is expressed
as a comparison to a unit of that quantity.

For example, the value of a physical quantity Z is expressed as the product of a unit [Z] and a numerical factor:

Z = n x [Z] = n[Z] So if we were to let Z be “2 antique sofas” then Z = 2[Z] = 2 antique sofas.

Fifteen hundred miles or so,
converts to roughly 7920000 feet
and 48 hours of land
across approximately 29 counties spread through 5 states

However,
in order to measure more abstract concepts,
different units of measurement are often adapted,
or hybridized, to fulfill ad-hoc need.

Coping,
for example,
is an abstract quantity
represented by

American Spirits:
(farenheit, inches, exhaled smoke as measured in cubic feet.)

Tears cried as designated driver
for termination
of unplanned pregnancy:
(miles, cost of service in U.S. Dollar, speed, tear volume in milliliters)

Furniture thrown:
Forces relevant to stable flight include a balance of
Propulsive ******. Lift,
created by the reaction
to an airflow
Drag, created by
aerodynamic friction
Weight,
created by gravity
Buoyancy, for lighter
than air flight

Holes in drywall:
(Inches in diameter and depth, potential bruises to be explained if the wall is ever further away than the human form in a darkened bedroom)

Unfortunately,
some concepts are still devoid of applicable units of measurement.

Take for example, the concept of Waiting.

As it has no defined beginning,
or end, and is malleable based on
external factors such as perceived value
and level of psychosocial dependency,
there appears to be no observable limit
regarding absolute human capacity capabilities.