59124421 ÷ 345 
The aim is to understand the frequency of 345 in 59124421.

On to step 1:
345 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 345

Let's proceed to step 2:
59 divided by 345 is 0 with a remainder of 59.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 59, we get 59.
Fetch the next digit (1) from the dividend, attach it to 59 and continue: 591 / 345

Moving on to step 3:
345 goes into 591 1 times with a remainder of 246.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 246 after subtracting 345 from 591.
Append the next digit (2) from the dividend to 246 and continue with: 2462 / 345

Step 4:
345 can be fit into 2462 7 times, resulting in a remainder of 47.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtract 2415 from 2462 to get 47.
Take the next digit (4) from the dividend and append it to 47, then repeat: 474 / 345

Step 5:
345 goes into 474 1 times with a remainder of 129.
Use 1 as the next digit of our solution. 
Result so far: 171.0
The remainder is 129 after subtracting 345 from 474.
Grab the next digit (4) from the dividend, add it to 129, then carry on: 1294 / 345

Step 6:
When dividing 1294 by 345, we get 3 with a remainder of 259.
Write down 3 as next digit of the result. 
Result so far: 1713.0
The remainder is 259 after subtracting 1035 from 1294.
Append the next digit (2) from the dividend to 259 and continue with: 2592 / 345

Step 7:
345 can be fit into 2592 7 times, resulting in a remainder of 177.
The next digit of our result is 7. 
Result so far: 17137.0
Subtract 2415 from 2592 to get 177.
Grab the next digit (1) from the dividend, add it to 177, then carry on: 1771 / 345

Step 8:
345 can be fit into 1771 5 times, resulting in a remainder of 46.
Put 5 as the next digit of the answer. 
Result so far: 171375.0
The remainder is 46 after subtracting 1725 from 1771.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 9:
345 can be fit into 460 1 times, resulting in a remainder of 115.
Put 1 as the next digit of the answer. 
Result so far: 171375.1
If we subtract 345 from 460, we 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 10:
The number 345 fits into 1150 3 times, leaving a remainder of 115.
The number 3 becomes the next digit in our result. 
Result so far: 171375.13
Deduct 1035 from 1150 and we're left with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Advancing to step 11:
If we divide 1150 by 345, we get 3 and a remainder of 115.
Record the quotient 3 as the next digit in the result. 
Result so far: 171375.133
The remainder is 115 after subtracting 1035 from 1150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

The final outcome is 171375.133, with a leftover of 0.0115.