15612421 ÷ 58 
The aim is to understand the frequency of 58 in 15612421.

Step 1:
58 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 58

Moving on to step 2:
58 goes into 15 0 times with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (6) from the dividend, attach it to 15 and continue: 156 / 58

Step 3:
If we divide 156 by 58, we get 2 and a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 116 away from 156, we end up with 40.
Grab the next digit (1) from the dividend, add it to 40, then carry on: 401 / 58

Advancing to step 4:
58 goes into 401 6 times with a remainder of 53.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
Subtracting 348 from 401 leaves us with 53.
Append the next digit (2) from the dividend to 53 and continue with: 532 / 58

On to step 5:
If we divide 532 by 58, we get 9 and a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 269.0
Subtracting 522 from 532 leaves us with 10.
Grab the next digit (4) from the dividend, add it to 10, then carry on: 104 / 58

On to step 6:
104 divided by 58 is 1 with a remainder of 46.
Use 1 as the next digit of our solution. 
Result so far: 2691.0
Subtracting 58 from 104 leaves us with 46.
Bring next digit (2) of the dividend behind the 46 and repeat the process: 462 / 58

Let's proceed to step 7:
If we divide 462 by 58, we get 7 and a remainder of 56.
Put 7 as the next digit of the answer. 
Result so far: 26917.0
The remainder is 56 after subtracting 406 from 462.
Include the next digit (1) from the dividend after 56, then repeat: 561 / 58

Step 8:
58 goes into 561 9 times with a remainder of 39.
Put 9 as the next digit of the answer. 
Result so far: 269179.0
Subtracting 522 from 561 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.

Advancing to step 9:
If we divide 390 by 58, we get 6 and a remainder of 42.
Write down 6 as next digit of the result. 
Result so far: 269179.6
Subtracting 348 from 390 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 10:
58 goes into 420 7 times with a remainder of 14.
The next digit of our result is 7. 
Result so far: 269179.67
The remainder is 14 after subtracting 406 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 11:
The number 58 fits into 140 2 times, leaving a remainder of 24.
The next digit of our result is 2. 
Result so far: 269179.672
Deduct 116 from 140 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 12:
When dividing 240 by 58, we get 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 269179.6724
If we subtract 232 from 240, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 13:
80 divided by 58 is 1 with a remainder of 22.
The number 1 becomes the next digit in our result. 
Result so far: 269179.67241
Subtracting 58 from 80 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 14:
58 goes into 220 3 times with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 269179.672413
Subtract 174 from 220 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 15:
460 divided by 58 is 7 with a remainder of 54.
Use 7 as the next digit of our solution. 
Result so far: 269179.6724137
If we subtract 406 from 460, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 16:
58 goes into 540 9 times with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 269179.67241379
The remainder is 18 after subtracting 522 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final result is 269179.67241379 with a remainder of 1.8e-08.