Feather MO bluefruit pwm frequency

Hi all,

I'm very new to this and am over my head, I hope I can get a little guidance for you folks here.

I need to change the pwm frequency for my Feather MO bluefruit.
The code I have been using works on my UNO but will not compile for the feather.
the error is as reads;

'TCCR1B' was not declared in this scope

I am unsure if I should post the entire code here.

Any help would be great.....be gentle I'm seriously over my head here.

#include <RGBLed.h>

#define REDPIN 9
#define GREENPIN 10
#define BLUEPIN 11

#define FADESPEED 1     // make this higher to slow down

void setup(){

  TCCR1B = TCCR1B & B11111000 | B00000001; // Set PWM frequency for D9 & D10:
  pinMode(9, OUTPUT); // Sets the pin as output
  pinMode(10, OUTPUT); // Sets the pin as output


  TCCR2B = TCCR2B & B11111000 | B00000001; // Set PWM for D3 & D11
  pinMode(3, OUTPUT); // Sets the pin as output
  pinMode(11, OUTPUT); // Sets the pin as output

pinMode(REDPIN, OUTPUT);
pinMode(GREENPIN, OUTPUT);
pinMode(BLUEPIN, OUTPUT);
}


void loop() {
int r, g, b;

// fade from blue to violet
for (r = 0; r < 256; r++) { 
  analogWrite(REDPIN, r);
  delay(FADESPEED);
} 
// fade from violet to red
for (b = 255; b > 0; b--) { 
  analogWrite(BLUEPIN, b);
  delay(FADESPEED);
} 
// fade from red to yellow
for (g = 0; g < 256; g++) { 
  analogWrite(GREENPIN, g);
  delay(FADESPEED);
} 
// fade from yellow to green
for (r = 255; r > 0; r--) { 
  analogWrite(REDPIN, r);
  delay(FADESPEED);
} 
// fade from green to teal
for (b = 0; b < 256; b++) { 
  analogWrite(BLUEPIN, b);
  delay(FADESPEED);
} 
// fade from teal to blue
for (g = 255; g > 0; g--) { 
  analogWrite(GREENPIN, g);
  delay(FADESPEED);
} 
}

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