These are the most frequently used words in this book.
another
apnea
asleep
awake
bed
better
body
brain
caffeine
cases
cause
center
clock
come
day
disorders
does
down
dr
drugs
during
effects
even
example
exercise
fall
feel
few
find
first
found
get
getting
give
go
going
good
help
hours
however
important
insomnia
insomniacs
keep
know
later
less
light
log
long
may
medical
medication
might
minutes
months
morning
mr
muscles
need
next
night
now
often
others
patients
people
person
pills
poor
problem
rem
second
see
seem
should
sleep
sleeping
slept
sometimes
still
stress
study
take
things
think
three
time
try
two
use
used
usually
want
week
whether
work
worry
years
yourself