420687 divided by 76 
The aim is to understand the frequency of 76 in 420687.

Step 1:
When dividing 4 by 76, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 76

Moving on to step 2:
The number 76 fits into 42 0 times, leaving a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Grab the next digit (0) from the dividend, add it to 42, then carry on: 420 / 76

Step 3:
76 can be fit into 420 5 times, resulting in a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 380 from 420 leaves us with 40.
Fetch the next digit (6) from the dividend, attach it to 40 and continue: 406 / 76

Advancing to step 4:
406 divided by 76 is 5 with a remainder of 26.
The number 5 becomes the next digit in our result. 
Result so far: 55.0
Subtract 380 from 406 to get 26.
Fetch the next digit (8) from the dividend, attach it to 26 and continue: 268 / 76

Step 5:
76 goes into 268 3 times with a remainder of 40.
The number 3 becomes the next digit in our result. 
Result so far: 553.0
If we subtract 228 from 268, we get 40.
Bring next digit (7) of the dividend behind the 40 and repeat the process: 407 / 76

Advancing to step 6:
The number 76 fits into 407 5 times, leaving a remainder of 27.
The number 5 becomes the next digit in our result. 
Result so far: 5535.0
If we subtract 380 from 407, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
The number 76 fits into 270 3 times, leaving a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 5535.3
If we subtract 228 from 270, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 8:
76 goes into 420 5 times with a remainder of 40.
The next digit of our result is 5. 
Result so far: 5535.35
Subtract 380 from 420 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 9:
When dividing 400 by 76, we get 5 with a remainder of 20.
The next digit of our result is 5. 
Result so far: 5535.355
Deduct 380 from 400 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 5535.355, with a leftover of 0.002.