59145991 ÷ 4 
The aim is to understand the frequency of 4 in 59145991.

On to step 1:
5 divided by 4 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 4 from 5 leaves us with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 4

Going ahead to step 2:
The number 4 fits into 19 4 times, leaving a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 14.0
If we take 16 away from 19, we end up with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 4

Advancing to step 3:
The number 4 fits into 31 7 times, leaving a remainder of 3.
The next digit of our result is 7. 
Result so far: 147.0
Subtract 28 from 31 to get 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 4

Advancing to step 4:
4 goes into 34 8 times with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 1478.0
Subtracting 32 from 34 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 4

On to step 5:
25 divided by 4 is 6 with a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 14786.0
If we subtract 24 from 25, we get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 4

Advancing to step 6:
19 divided by 4 is 4 with a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 147864.0
The remainder is 3 after subtracting 16 from 19.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 4

Going ahead to step 7:
The number 4 fits into 39 9 times, leaving a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 1478649.0
The remainder is 3 after subtracting 36 from 39.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 4

Advancing to step 8:
31 divided by 4 is 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 14786497.0
If we take 28 away from 31, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
If we divide 30 by 4, we get 7 and a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 14786497.7
If we subtract 28 from 30, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
4 can be fit into 20 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 14786497.75
If we take 20 away from 20, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
If we divide 0 by 4, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 14786497.75
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
4 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 14786497.75
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 14786497.75, and the remainder is 0.0.