We look at the division of 387924 by 51 
The aim is to understand the frequency of 51 in 387924.

Let's proceed to step 1:
51 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 51

On to step 2:
When dividing 38 by 51, we get 0 with a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Grab the next digit (7) from the dividend, add it to 38, then carry on: 387 / 51

Step 3:
387 divided by 51 is 7 with a remainder of 30.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 357 from 387 to get 30.
Bring next digit (9) of the dividend behind the 30 and repeat the process: 309 / 51

Step 4:
51 can be fit into 309 6 times, resulting in a remainder of 3.
The number 6 becomes the next digit in our result. 
Result so far: 76.0
Subtracting 306 from 309 leaves us with 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 51

Going ahead to step 5:
The number 51 fits into 32 0 times, leaving a remainder of 32.
Use 0 as the next digit of our solution. 
Result so far: 760.0
If we take 0 away from 32, we end up with 32.
Fetch the next digit (4) from the dividend, attach it to 32 and continue: 324 / 51

Moving on to step 6:
51 goes into 324 6 times with a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 7606.0
If we take 306 away from 324, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
The number 51 fits into 180 3 times, leaving a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 7606.3
If we subtract 153 from 180, 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.

Step 8:
270 divided by 51 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 7606.35
Deduct 255 from 270 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
51 goes into 150 2 times with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 7606.352
If we take 102 away from 150, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 10:
If we divide 480 by 51, we get 9 and a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 7606.3529
The remainder is 21 after subtracting 459 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 11:
51 can be fit into 210 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 7606.35294
Subtract 204 from 210 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 12:
51 can be fit into 60 1 times, resulting in a remainder of 9.
The next digit of our result is 1. 
Result so far: 7606.352941
If we take 51 away from 60, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 13:
The number 51 fits into 90 1 times, leaving a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 7606.3529411
Subtracting 51 from 90 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The quotient of the division is 7606.3529411, and the remainder is 3.9e-07.