21.   The players are only getting between five and six hours sleep a night which is not enough.

v. + night >>共 320
spend 63.17%
have 3.05%
follow 1.80%
take 1.60%
remember 1.49%
fill 0.97%
say 0.97%
include 0.76%
sleep 0.73%
end 0.59%
sleep + n. >>共 117
night 10.10%
deprivation 4.33%
hour 2.88%
pattern 2.88%
wink 1.92%
disturbance 1.92%
disorder 1.92%
six 1.92%
people 1.92%
sleep 1.44%
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