We look at the division of 91586887 by 124 
The aim is to understand the frequency of 124 in 91586887.

Step 1:
The number 124 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 124

Advancing to step 2:
91 divided by 124 is 0 with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Bring next digit (5) of the dividend behind the 91 and repeat the process: 915 / 124

Advancing to step 3:
If we divide 915 by 124, we get 7 and a remainder of 47.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 868 from 915, we get 47.
Append the next digit (8) from the dividend to 47 and continue with: 478 / 124

Going ahead to step 4:
124 goes into 478 3 times with a remainder of 106.
Record the quotient 3 as the next digit in the result. 
Result so far: 73.0
The remainder is 106 after subtracting 372 from 478.
Fetch the next digit (6) from the dividend, attach it to 106 and continue: 1066 / 124

Going ahead to step 5:
1066 divided by 124 is 8 with a remainder of 74.
Write down 8 as next digit of the result. 
Result so far: 738.0
If we subtract 992 from 1066, we get 74.
Include the next digit (8) from the dividend after 74, then repeat: 748 / 124

Going ahead to step 6:
When dividing 748 by 124, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 7386.0
The remainder is 4 after subtracting 744 from 748.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 124

Going ahead to step 7:
If we divide 48 by 124, we get 0 and a remainder of 48.
The number 0 becomes the next digit in our result. 
Result so far: 73860.0
Deduct 0 from 48 and we're left with 48.
Bring next digit (7) of the dividend behind the 48 and repeat the process: 487 / 124

Going ahead to step 8:
487 divided by 124 is 3 with a remainder of 115.
The number 3 becomes the next digit in our result. 
Result so far: 738603.0
Subtract 372 from 487 to get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Let's proceed to step 9:
1150 divided by 124 is 9 with a remainder of 34.
The next digit of our result is 9. 
Result so far: 738603.9
Deduct 1116 from 1150 and we're left with 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:
340 divided by 124 is 2 with a remainder of 92.
Write down 2 as next digit of the result. 
Result so far: 738603.92
If we subtract 248 from 340, we get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 11:
920 divided by 124 is 7 with a remainder of 52.
Record the quotient 7 as the next digit in the result. 
Result so far: 738603.927
Subtract 868 from 920 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 12:
When dividing 520 by 124, we get 4 with a remainder of 24.
Put 4 as the next digit of the answer. 
Result so far: 738603.9274
If we subtract 496 from 520, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 13:
If we divide 240 by 124, we get 1 and a remainder of 116.
The number 1 becomes the next digit in our result. 
Result so far: 738603.92741
If we subtract 124 from 240, we get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Advancing to step 14:
1160 divided by 124 is 9 with a remainder of 44.
Put 9 as the next digit of the answer. 
Result so far: 738603.927419
Subtracting 1116 from 1160 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 15:
440 divided by 124 is 3 with a remainder of 68.
The next digit of our result is 3. 
Result so far: 738603.9274193
Deduct 372 from 440 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 16:
If we divide 680 by 124, we get 5 and a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 738603.92741935
Deduct 620 from 680 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The quotient of the division is 738603.92741935, and the remainder is 6e-08.