KuRIoS said that reducing the limit would make spammers and bots abuse the search and cause major problems... Well I've come to a solution!
A search Q and A, simple questions anyone in their right mind could do.
EX.
"How many ears does an average human have?"
Answer: 2
I think this could be the way to reduce the search cooldown without having spammers.
Not saying do away with the timer just reduce it to 20 seconds.