LTM4626 operating frequency setting


I don't unterstand the how to calculate Rfset to modify operating frequency.

The datasheet gives with Rset connected between FREQ and GND :

Does it mean 274KOhm in parallel with Rfset ?

An other point is : on eval board, FREQ pin can be connected  with a resistor to GND and another to INTVCC.

What is the function of the resistor between FREQ and INTVCC ?

Best regards

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