We're dividing 93171628 by 391 
The aim is to understand the frequency of 391 in 93171628.

On to step 1:
The number 391 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 391

Advancing to step 2:
391 goes into 93 0 times with a remainder of 93.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 93 and we're left with 93.
Fetch the next digit (1) from the dividend, attach it to 93 and continue: 931 / 391

Step 3:
When dividing 931 by 391, we get 2 with a remainder of 149.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 782 from 931 to get 149.
Take the next digit (7) from the dividend and append it to 149, then repeat: 1497 / 391

Step 4:
391 goes into 1497 3 times with a remainder of 324.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
The remainder is 324 after subtracting 1173 from 1497.
Grab the next digit (1) from the dividend, add it to 324, then carry on: 3241 / 391

Going ahead to step 5:
If we divide 3241 by 391, we get 8 and a remainder of 113.
The next digit of our result is 8. 
Result so far: 238.0
The remainder is 113 after subtracting 3128 from 3241.
Bring next digit (6) of the dividend behind the 113 and repeat the process: 1136 / 391

Let's proceed to step 6:
391 goes into 1136 2 times with a remainder of 354.
Record the quotient 2 as the next digit in the result. 
Result so far: 2382.0
Subtracting 782 from 1136 leaves us with 354.
Fetch the next digit (2) from the dividend, attach it to 354 and continue: 3542 / 391

Moving on to step 7:
When dividing 3542 by 391, we get 9 with a remainder of 23.
Put 9 as the next digit of the answer. 
Result so far: 23829.0
The remainder is 23 after subtracting 3519 from 3542.
Bring next digit (8) of the dividend behind the 23 and repeat the process: 238 / 391

Advancing to step 8:
If we divide 238 by 391, we get 0 and a remainder of 238.
The next digit of our result is 0. 
Result so far: 238290.0
Subtracting 0 from 238 leaves us with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Step 9:
The number 391 fits into 2380 6 times, leaving a remainder of 34.
The next digit of our result is 6. 
Result so far: 238290.6
If we subtract 2346 from 2380, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 10:
When dividing 340 by 391, we get 0 with a remainder of 340.
The number 0 becomes the next digit in our result. 
Result so far: 238290.6
The remainder is 340 after subtracting 0 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

On to step 11:
3400 divided by 391 is 8 with a remainder of 272.
Put 8 as the next digit of the answer. 
Result so far: 238290.608
If we subtract 3128 from 3400, we get 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Moving on to step 12:
If we divide 2720 by 391, we get 6 and a remainder of 374.
Put 6 as the next digit of the answer. 
Result so far: 238290.6086
The remainder is 374 after subtracting 2346 from 2720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Going ahead to step 13:
The number 391 fits into 3740 9 times, leaving a remainder of 221.
The next digit of our result is 9. 
Result so far: 238290.60869
If we subtract 3519 from 3740, we get 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Moving on to step 14:
391 can be fit into 2210 5 times, resulting in a remainder of 255.
Record the quotient 5 as the next digit in the result. 
Result so far: 238290.608695
If we subtract 1955 from 2210, we get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Step 15:
When dividing 2550 by 391, we get 6 with a remainder of 204.
Record the quotient 6 as the next digit in the result. 
Result so far: 238290.6086956
Subtracting 2346 from 2550 leaves us with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Moving on to step 16:
391 goes into 2040 5 times with a remainder of 85.
Record the quotient 5 as the next digit in the result. 
Result so far: 238290.60869565
If we take 1955 away from 2040, we end up with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

The quotient of the division is 238290.60869565, and the remainder is 8.5e-08.