"This is something that has been apparent for some time now."

It may not be apparent on the surface that they've failed, for example.

The next problem did not become apparent for more than a year.

Evidence of this is apparent throughout the novels, for more information, see here.

No other significant findings are apparent for this group of items.

His voice was quiet with more strength in it than had been apparent for several days.

The reason might not be apparent to you for a while.

This was apparent during the reform of the sugar market, for example.

That has been all too apparent for some considerable time.

How much the new technology helps will not be apparent for a while.