We're dividing 91937 by 51 
The aim is to understand the frequency of 51 in 91937.

On to step 1:
9 divided by 51 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 51

Moving on to step 2:
When dividing 91 by 51, we get 1 with a remainder of 40.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 51 from 91 and we're left with 40.
Grab the next digit (9) from the dividend, add it to 40, then carry on: 409 / 51

Going ahead to step 3:
51 can be fit into 409 8 times, resulting in a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 18.0
Deduct 408 from 409 and we're left with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 51

Advancing to step 4:
51 can be fit into 13 0 times, resulting in a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 180.0
If we take 0 away from 13, we end up with 13.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 51

Let's proceed to step 5:
The number 51 fits into 137 2 times, leaving a remainder of 35.
Write down 2 as next digit of the result. 
Result so far: 1802.0
If we subtract 102 from 137, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 6:
When dividing 350 by 51, we get 6 with a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 1802.6
If we subtract 306 from 350, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 7:
51 goes into 440 8 times with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 1802.68
Subtract 408 from 440 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 8:
51 goes into 320 6 times with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 1802.686
If we subtract 306 from 320, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 9:
51 can be fit into 140 2 times, resulting in a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 1802.6862
If we take 102 away from 140, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 10:
51 goes into 380 7 times with a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 1802.68627
The remainder is 23 after subtracting 357 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 11:
If we divide 230 by 51, we get 4 and a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 1802.686274
If we take 204 away from 230, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 12:
51 goes into 260 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 1802.6862745
The remainder is 5 after subtracting 255 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 13:
51 goes into 50 0 times with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 1802.6862745
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 1802.6862745 with a remainder of 5e-08.