Datasheet

This particular FRAM chip has 256 Kbits (32 KBytes) of storage, interfaces using I2C, and can

run at up to 1MHz I2C rates. Each byte can be read and written instantaneously (like SRAM)

but will keep the memory for 95 years at room temperature. Each byte can be read/written

10,000,000,000,000 times so you don't have to worry too much about wear leveling.