We look at the division of 421624 by 74 
The aim is to understand the frequency of 74 in 421624.

Advancing to step 1:
If we divide 4 by 74, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 74

Let's proceed to step 2:
42 divided by 74 is 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Take the next digit (1) from the dividend and append it to 42, then repeat: 421 / 74

Let's proceed to step 3:
74 goes into 421 5 times with a remainder of 51.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtract 370 from 421 to get 51.
Append the next digit (6) from the dividend to 51 and continue with: 516 / 74

Advancing to step 4:
74 can be fit into 516 6 times, resulting in a remainder of 72.
The next digit of our result is 6. 
Result so far: 56.0
If we take 444 away from 516, we end up with 72.
Fetch the next digit (2) from the dividend, attach it to 72 and continue: 722 / 74

Let's proceed to step 5:
When dividing 722 by 74, we get 9 with a remainder of 56.
The number 9 becomes the next digit in our result. 
Result so far: 569.0
Deduct 666 from 722 and we're left with 56.
Append the next digit (4) from the dividend to 56 and continue with: 564 / 74

Let's proceed to step 6:
564 divided by 74 is 7 with a remainder of 46.
The next digit of our result is 7. 
Result so far: 5697.0
Deduct 518 from 564 and we're left with 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 7:
460 divided by 74 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 5697.6
The remainder is 16 after subtracting 444 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 8:
The number 74 fits into 160 2 times, leaving a remainder of 12.
The next digit of our result is 2. 
Result so far: 5697.62
Subtracting 148 from 160 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
When dividing 120 by 74, we get 1 with a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 5697.621
If we subtract 74 from 120, we 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.

Advancing to step 10:
74 goes into 460 6 times with a remainder of 16.
The next digit of our result is 6. 
Result so far: 5697.6216
The remainder is 16 after subtracting 444 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
74 can be fit into 160 2 times, resulting in a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 5697.62162
The remainder is 12 after subtracting 148 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 12:
If we divide 120 by 74, we get 1 and a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 5697.621621
Subtract 74 from 120 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.

Step 13:
460 divided by 74 is 6 with a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 5697.6216216
If we take 444 away from 460, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
160 divided by 74 is 2 with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 5697.62162162
If we take 148 away from 160, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 5697.62162162, and the remainder is 1.2e-08.