ADJ

full
broad, wide
a broad span of interests
clear
The bridge has a clear span of 36 metres
12-foot, 500-metre, etc.
wing (also wingspan)
The bird has a 1-metre wingspan

ADJ

long
short
10-day, 2-week, etc.
entire
allotted
The speech continued well beyond its allotted span
time
life (also lifespan)
attention, concentration, memory
He has a short attention span

VERB + SPAN

cover
The book covers the entire span of Arab history

PREP

over a/the ~
Developments were monitored over a span of two years

PHRASES

a span of time/years