i need a frequency counter ,should read like 001-999 hz,1.00-99.9khz,10.0-9.99 khz,100-999 mhz , on 16*2 lcd upto 10mhz

 

PIClist has a project that became a classic. Please see if fits your requirements.

 

i need a frequency counter ,should read like 001-999 hz,1.00-99.9khz,10.0-9.99 khz,100-999 mhz , on 16*2 lcd upto 10mhz

You need to pay attention and be careful with units.
Hertz is written Hz.

10mHz and 10MHz are not the same thing. They differ by a factor of 1000,000,000.

 

PIC frequency counter LCD
I cannot find the counter I have. This is about the same. Many of the old PICs will count to 50mhz.